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Ibanez RG421HPFM
Ibanez RGRTB621 Iron Label
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Playability
75
Sound
75
Build
58
Value
74
Score
69
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Playability
78
Sound
77
Build
69
Value
75
Score
75
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Ibanez RG421HPFM vs RGRTB621 Iron Label

Reasons to Get
Ibanez RG421HPFM over RGRTB621 Iron Label

Decorative Top
Flamed Maple vs None
Finished with beautiful natural wood patterns
Pickup Mods
Coil Split vs Coil Tap
Splits humbuckers into single coil pickups
Fretboard Radius
16'' (406.4mm) vs 15.75'' (400.1mm)
Flatter fretboard makes it easier to play single notes and bend

Reasons to Get
Ibanez RGRTB621 Iron Label over RG421HPFM

Release Year
2022 vs 2020
From a more recent year
Pickup Mods
Coil Tap vs Coil Split
Lowers output of humbucker coil to create a single coil sound
Neck Joint
Neck-Through vs Bolt-On
Stronger neck and easier access to upper frets
Switch Positions
5 vs 3
More tone options
Locking Tuners
Yes vs None
Easier to change strings
Fretboard Radius
15.75'' (400.1mm) vs 16'' (406.4mm)
More curved fretboard helpful to play chords without muting strings
Value Score
75 vs 74
Better price/quality relationship

Other Key Differences
Ibanez RG421HPFM vs RGRTB621 Iron Label

Bridge Pickup
DiMarzio The Tone Zone vs DiMarzio Fusion Edge
Different Bridge Pickup
Neck Pickup
DiMarzio Air Norton vs DiMarzio Fusion Edge
Different Neck Pickup
Neck Wood
Roasted Maple vs Maple
Different Neck Wood
Fretboard Wood
Jatoba vs Ebony
Different Fretboard Wood
Headstock
6 vs R6
Different Headstock

Shared Features
Ibanez RG421HPFM vs RGRTB621 Iron Label

Body Wood
Nyatoh
Same Body Wood
Nut Material
Plastic
Same Nut Material
Strings
6
Same playing style
Body Type
Solid Body
Feedback free
Volume Knobs
1
Same volume control
Tone Knobs
1
Same tone control
Pickups
HH
High output without hum
Number of Frets
24
Same maximum octave
Neck Thickness at 1st Fret
0.75'' (19.1mm)
Same neck comfortability
Neck Thickness at 12th Fret
0.83'' (21.1mm)
Same neck comfortability
Nut Width
1.693'' (43mm)
Same string separation at the nut
Paint Finish
Poly
Resistant paint that ages well
Bridge
Fixed
Good sustain and needs no set-up
Scale Length
25.5'' (647.7mm)
Same string tension and fret separation
Pickups Power
Passive
Cleaner sound and no battery needed
Neck Profile Type
Wizard
Thin neck for playing fast
Type of Frets
Jumbo
You won't feel the fretboard when pressing down the strings

Common Strengths

  • Luminescent Sidedots
  • Top Pickup Brand

Common Weaknesses

  • Weight Relief
  • Stays in Tune (Evertune)
  • High-Quality Nut
  • High-Quality Frets
  • Compound Radius Fretboard
  • From a High-Quality-Standards Country
  • Strap Lock
  • 21:1 Tuner Ratio
  • Active/Passive Preamp

Table of Contents

Price History Comparison

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Which One is Better Overall?

After going through our comparison algorithm, the results show that the Ibanez RGRTB621 Iron Label is probably the better product overall with its final score of 75 compared to the Ibanez RG421HPFM's 69 score, although not by a lot.

The Ibanez RGRTB621 Iron Label wins when it comes to sound, playability, build quality, value for the money. This means that it wins over the Ibanez RG421HPFM in every aspect.

If you got small hands, none of these instruments will make a big difference when it comes to comfortability.

Which One is Better for Beginners?

If you're looking for your first guitar to learn how to play, the Ibanez RGRTB621 Iron Label is the better choice.

The Ibanez RGRTB621 Iron Label meets 5 out of our 8 criteria items for beginner friendliness, while the Ibanez RG421HPFM meets only 4. This takes into account the type of frets, scale length, nut width, bridge type, fretboard radius, and neck profile to determine the easiest combination for new players.

New Player Friendliness

Ibanez RG421HPFM
  • Comfortable shape
  • Easy-to-use bridge
  • Tall frets
  • Comfortable neck
  • Comfortable fretboard
  • Narrow nut
  • Short scale
  • Locking tuners

New Player Friendliness

Ibanez RGRTB621 Iron Label
  • Comfortable shape
  • Easy-to-use bridge
  • Locking tuners
  • Tall frets
  • Comfortable neck
  • Comfortable fretboard
  • Narrow nut
  • Short scale

Nevertheless, when it comes to choosing an instrument, you should pick the one more compatible with your personal style. Still, below we'll try you to give you our results as objectively as it's possible to help you decide.

Ibanez RG421HPFM Overview

  • From Ibanez's 2020 RG series
  • Made in Indonesia
  • 6 strings
  • 25.5"'' scale
  • 16" Fretboard Radius
  • Flamed Maple top
  • Nyatoh body
  • Roasted Maple neck
  • Jatoba fretboard
  • Bridge pickup: DiMarzio The Tone Zone (Humbucker/Passive)
  • Neck pickup: DiMarzio Air Norton (Humbucker/Passive)
  • 1 volume and 1 tone Dome knobs
  • 3-way Switch
  • F106 bridge
  • Wizard III Bolt-On neck
  • 24 Jumbo frets
  • Ibanez tuners
  • Weight between 6.05lbs (2.7kgs) and 6.35lbs (2.9kgs)
  • Compare Specs >

Ibanez RGRTB621 Iron Label Overview

  • From Ibanez's 2022 RG series
  • Made in Indonesia
  • 6 strings
  • 25.5"'' scale
  • 15.75" Fretboard Radius
  • Nyatoh body
  • Maple/Walnut neck
  • Ebony fretboard
  • Bridge pickup: DiMarzio Fusion Edge (Humbucker/Passive)
  • Neck pickup: DiMarzio Fusion Edge (Humbucker/Passive)
  • 1 volume and 1 tone Dome knobs
  • 5-way Switch
  • Mono-rail bridge
  • Nitro Wizard Neck-Through neck
  • 24 Jumbo frets
  • Gotoh MG-T locking machine heads tuners
  • Compare Specs >

Sound Quality Comparison

The wood used in an electric guitar or bass is not as important to determine the final tone. However, some people prefer specific wood types, so we'll take a look at those first. Then, we'll take a look at the electronics to determine the versatility and sound quality of each instrument.

Woods Used in Both

Nyatoh wood pattern used for guitar building
Nyatoh

Nyatoh has been replacing Mahogany for guitar building. It's fairly hard, durable, more sustentable and common than Mahogany. Find out more about Nyatoh.

Woods Used in the Ibanez RG421HPFM

Roasted Maple wood pattern used for guitar building
Roasted Maple
Jatoba wood pattern used for guitar building
Jatoba

Roasted Maple is just maple without a finish. It's technically cheaper than regular maple, but it doesn't have any extra disadvantages because of this. The color is darker, and it's lighter weight and very stable even when there's a lot of humidity.

Jatoba is a hard and dense wood that emphasizes the mid-lows, giving a fuller, more round sound than, for example, Mahogany. However, it also has a lot of clarity in the top end. Find out more about Jatoba.

Woods Used in the Ibanez RGRTB621 Iron Label

Maple wood pattern used for guitar building
Maple
Ebony wood pattern used for guitar building
Ebony

Maple is one of the most popular necks for good reasons. It is a strong wood that is relatively cheap to make and looks beautiful. The highest quality maple is the hardest that comes from North America. Find out more about Maple.

Ebony is a high-end wood, so it is not cheap. It's only used for fretboards because it's also very heavy. It does an excellent job as a durable material while looking elegant. Find out more about Ebony.

Winner: Ibanez RGRTB621 Iron Label.

Pickup Configuration

Both pickup configurations are HH. Double Humbucker (HH) is the choice for people who want a fuller, more round sound with tons of mids and lows. Humbuckers also get rid of the hum noise that plague single-coil pickups. They can work out for almost any genre going from Djent to even Jazz.

Pickups Quality

Both come with very good pickups from at least one of the specialized brands in the market. With pickups like these, you probably won't need an upgrade anytime soon.

You can purchase similar pickups to the Ibanez RG421HPFM's and use them on any guitar:

Both use Passive pickups. This is what's used for most music genres. They have a regular output and will serve you for both high-gain and clean tones. The alternative (Active pickups) offer a higher output that is mostly used for heavy music.

Winner: Tie.

Versatility Comparison

Some instruments offer you more ways to explore your creativity than others. Below you'll find how both compare when it comes to versatility.

Switch Options

The Ibanez RGRTB621 Iron Label gives you 5 switch options while the Ibanez RG421HPFM gives you 3. This means that the Ibanez RGRTB621 Iron Label gives you more options to find the right pickup combination for the type of sound you want to achieve

Both give you different pickup mod options.

The Ibanez RG421HPFM offers Coil Split.

Coil Split lets you disconnect one of the pickup coils. When used with humbuckers, it turns them into single-coil with lower output and cleaner tone.

On the other hand, the Ibanez RGRTB621 Iron Label comes with the following: Coil Tap.

Coil Tap is similar to Coil Split but it works a bit differently. Instead of completely cancelling one of the coils of the humbucker, it only cuts part of the output once activated. Some people believe this gives the split pickups a more real single-coil sound.

Ibanez RG421HPFM pickups switch and push knobs diagram
Ibanez RG421HPFM's switch options
Ibanez RGRTB621 Iron Label pickups switch selector and push knobs diagram
Ibanez RGRTB621 Iron Label's switch options

When evaluating versatility, we also take into consideration bridge and neck joint type, number of frets, switch options, amount of pickups and more.

Winner: Ibanez RG421HPFM.

Final Sound Quality Scores

Ibanez RG421HPFM
Pickups 85
Sustain 80
Versatility 69
Tuning Stability 65
Sound 75
Ibanez RGRTB621 Iron Label
Pickups 85
Sustain 80
Versatility 67
Tuning Stability 75
Sound 77

Build Quality Comparison

When it comes to build quality, we like to take into account everything used to build the instrument. This includes materials, hardware and the quality control expected depending on the country where it was built. Let's see how the Ibanez RG421HPFM compares to the Ibanez RGRTB621 Iron Label.

Country of Origin

The manufacturing country can tell a lot about the build quality of an instrument. Both in this comparison where made in Indonesia.

Indonesia is becoming the most popular country for guitar building because they can make good instruments for a low price. Some people think that they're 'the new China' when it comes to build quality. But the truth is that Indonesian guitars are more consistent, although Chinese quality has improved a lot in the last few years.

Winner: Tie

Nut Material

If you want your guitar to stay in tune and sound good, you need a well cut nut. Nut quality can be inconsistent even when comparing two copies of the same model. The best way to make sure you're nut will be well done is by getting a nut made by an expert company like TUSQ or Micarta.

In this case, both have Plastic nuts. This is a low-quality nut that you might want to consider upgrading soon. Bone and TUSQ nuts are the best for guitars with a fixed or simple tremolo bridge.

Fret Material

Most fret wire is made of nickel silver. This material eventually wears down after a lot of use and most instruments end up needing a complete fret replacement. However, some expensive models come with stainless steel frets. This is what you should aim for if you can afford it.

Unfortunately, none of them come with stainless steel frets.

Winner: Tie.

Bridge

The perfect bridge for you will depend on your playstyle because they all have advantages and disadvantages. However, some bridges are more expensive—like Floyd Roses and Evertunes—and thus add more value to a guitar.

Both come with a similar bridge: Fixed. It's a simple bridge that is very beginner-friendly since it doesn't require any set-up. You can swap strings easily. It might also give more sustain since it doesn't have complex moving parts that make the strings lose vibration. However, it doesn't have the same versatility as a tremolo bridge.

Since we need to be objective, the most expensive type of bridge will be the winner of this section. In the end, this doesn't matter if you're not going to use the bridge for its original purpose, so choose the bridge that fits your playing style better.

Winner: Tie.

Tuners

The Ibanez RGRTB621 Iron Label has the best tuners of the two because they are locking tuners. They'll help to keep your guitar in tune because they allow you to tune it without wrapping the strings around the posts. This avoids variations in the tuning due to the strings changing position at the post after a bend. They come at the disadvantage of being slightly heavier than regular tuners. Also, it makes it a lot easier to restring.

Winner: Ibanez RGRTB621 Iron Label.

Neck Joint

Contrary to popular belief, the difference in sustain and tone that some neck joints give to a guitar is simply unperceivable—if they're all well built. However, some of them do have advantages over the others.

The Ibanez RG421HPFM has a Bolt-On neck joint. This neck is joined to the body by 4 bolts that you can simply unscrew. This allows you to replace the neck or take it off for travel. It's the most common and cheapest way to build a guitar.

On the other hand, the Ibanez RGRTB621 Iron Label comes with Neck-Through neck joint. This neck is a lot more resistant and lets builders give the neck joint a more comfortable shape for soloing at the upper frets. The disadvantage is that they're more expensive and that if you damage your neck, you can't simply replace it like with bolt-on necks.

Winner: Ibanez RGRTB621 Iron Label.

Here is the list of features that were considered when choosing the winner in the Features subcategory:

Strengths & Weaknesses
Ibanez RG421HPFM
  • Top Brand Pickups
  • Coil Split Pickups
  • Luminescent Inlay
  • Cheap Fret Wire (NS)
  • No Locking Tuners
  • Made in Indonesia
  • No Expensive Woods
  • No High-Quality Nut
  • No Neck-Through Build
  • No Weight Relief
  • No Tremolo
  • No Compound Radius Fretboard
  • No 21:1 Tuner Ratio
  • No Strap Lock
Strengths & Weaknesses
Ibanez RGRTB621 Iron Label
  • Locking Tuners
  • Expensive Wood
  • Top Brand Pickups
  • Neck-Through Build
  • Coil Tap Pickups
  • Luminescent Inlay
  • Cheap Fret Wire (NS)
  • Made in Indonesia
  • No High-Quality Nut
  • No Weight Relief
  • No Tremolo
  • No Compound Radius Fretboard
  • No 21:1 Tuner Ratio
  • No Strap Lock

Final Build Quality Scores

Ibanez RG421HPFM
Quality of materials 45
Features 60
Quality Control 70
Build Quality 58
Ibanez RGRTB621 Iron Label
Quality of materials 51
Features 80
Quality Control 75
Build Quality 69

Playability Comparison

Let's now compare their playability. Bear in mind that the instrument will feel different depending on your hand size and play style. That's why you should always test before buying. But if you can't or want a second opinion on it, we can still take a look at each of the important measurements of the instrument for you. This way, we can predict how easy a guitar might be to play, or how different it will feel compared to the other.

Remember that, even though the difference might seem small, every inch counts when it comes to feeling of the instrument in your hands. Any variation can completely change how comfortable a guitar feels in your hands.

Nut Width

Ibanez RG421HPFM Nut Width
Both Guitars Have The Same Nut Width

The nut width will affect the separation between strings at the nut. In this comparison, both have a nut width of 43mm (1.693'').

This is within the most common range of nut widths for a 6-string guitar. It offers a good balance of string separation at the nut. It's the size that most guitarists prefer as it gives them just enough space to play open chords without muting the strings, but without spreading the strings too wide and making bar chords difficult to perform.

Scale Length

Ibanez RG421HPFM and Ibanez RGRTB621 Iron Label's Scale Length
Both have the same scale length

The scale length is one of the things that influences playability the most. This is the distance between the nut and the bridge and will affect everything from low action allowance, difficulty to perform bends, fret separation, and even tone.

In this case, both have a scale length of 25.5".

This is the scale used in most Stratocasters. It's slightly longer than the typical 24.75'' size found in Les Pauls, and it's one of the main reasons why Stratocasters have such a bright sound in general. A longer scale also means that the strings will have higher tension. This will help you get lower action without suffering fret buzz, which will also be helpful when playing in lower tunings without having to increase your string gauge.

However, this also means that there will be more separation between frets, which can make it more difficult to play. Also, bending the strings will require more strengths due to the increased tension, but remember that a tremolo guitar will offset this difficulty.

Lastly, remember that you can also affect the tension of the strings by changing your string gauge. You can use a thicker gauge for more tension and a lighter one for less tension.

Neck Profile

Ibanez RG421HPFM Neck Profile
Ibanez RG421HPFM's neck profile
Ibanez RGRTB621 Iron Label Neck Profile
Ibanez RGRTB621 Iron Label's neck profile

No single neck shape is better than others. However, most people tend to prefer a thinner necks because it doesn't get in their way when playing fast and most hand sizes can adapt to it pretty well. However, some people still prefer thicker necks for a better grip, especially if they have big hands.

Both the Ibanez RG421HPFM and the Ibanez RGRTB621 Iron Label have a Wizard-shaped neck. This is thinner than most C-type necks. It won't get in your way if you want to play fast solos. It's not as slim as 'Super Wizard' necks, so it might fit you better if you don't like ultra-thin necks.

Fretboard Radius

Ibanez RG421HPFM Fingerboard Radius
Ibanez RG421HPFM's Fingerboard radius
Ibanez RGRTB621 Iron Label Fingerboard Radius
Ibanez RGRTB621 Iron Label's Fingerboard radius

Most guitar fretboards are not flat; they usually have a curve or arc across their width. A curved fretboard will make it easier to perform chords without muting strings, while a flatter one will make it easier to play single notes, which is good for bending and soloing in general. The best fretboards have a compound radius that varies across the fingerboard, but they're not common since they take a lot more work to build.

In this case, the Ibanez RGRTB621 Iron Label's fingerboard radius is smaller, which means it's more curved than the Ibanez RG421HPFM's. This extra arc will make playing chords easier in this model. You won't be as likely to mute the strings, especially if you have big hands. However, playing single notes and bending will be easier on the Ibanez RG421HPFM.

Still, both tend to favor soloing over chords, so if you're looking for a guitar for playing rhythm, you might want something else with a radius closer to a Stratocaster's 9.5''.

Hand Size Comfortability

Everyone has a different hand size, and that's why it's recommended to try a guitar before buying, even if others tell you that it's comfortable to play. However, we can know whether a guitar favors small or large hands just by knowing its exact measurements.

After taking into account the scale length, nut width, neck profile and fretboard radius, we can conclude that both in this comparison favor small hands .

Ibanez RG421HPFM:
Big Hands
Small Hands
Ibanez RGRTB621 Iron Label:
Big Hands
Small Hands

Fret Size

Ibanez RG421HPFM and Ibanez RGRTB621 Iron Label Frets Size
Both have a similar Jumbo fret size

Both have a Jumbo fret size. This is one of the tallest frets you can get. You won't feel the fretboard when pressing down the strings. It will give you the best sustain and all types of chords will be easier to play. However, you can end up changing the pitch of your notes if you press too hard, which is something people used to feeling the fretboard do when trying Jumbo frets for the first time.

Final Playability Scores

Ibanez RG421HPFM
Bending & Vibrato Ease 85
Chord Playability 50
Solo Playability 90
Playability 75
Ibanez RGRTB621 Iron Label
Bending & Vibrato Ease 85
Chord Playability 50
Solo Playability 100
Playability 78

Specs Side-by-Side

Ibanez RG421HPFM vs RGRTB621 Iron Label
General Ibanez RG421HPFM RGRTB621 Iron Label
Brand: Ibanez Ibanez
Year: 2020 2022
Configuration: HH HH
Strings: 6 6
Made in: Indonesia Indonesia
Series: RG RG
Colors: Blue Black
Left-Handed Version: No No
Body
Type: Solid Body Solid Body
Body Material: Nyatoh Nyatoh
Bridge: F106 Mono-rail
Neck
Neck Joint: Bolt-On Neck-Through
Tuners: Ibanez Gotoh MG-T locking machine heads
Fretboard: Jatoba Ebony
Neck Material: Roasted Maple Maple/Walnut
Decoration: White Dot
Scale Size: 25.5" 25.5"
Shape: Wizard III Nitro Wizard
Thickness: 1st Fret: 0.75'' (19.1mm) - 12th Fret: 0.83'' (21.1mm) 1st Fret: 0.75'' (19.1mm) - 12th Fret: 0.83'' (21.1mm)
Frets: 24 Jumbo Nickel Silver 24 Jumbo Nickel Silver
Fretboard Radius: 16" 15.75"
Nut: Plastic Plastic
Nut Width: 43mm (1.693'') 43mm (1.693'')
Electronics
Bridge Pickup: DiMarzio The Tone Zone (Humbucker / Passive) DiMarzio Fusion Edge (Humbucker / Passive)
Middle Pickup:
Neck Pickup: DiMarzio Air Norton (Humbucker / Passive) DiMarzio Fusion Edge (Humbucker / Passive)
Switch: 3 Way 5 Way
Knobs: Dome Dome
Pickup Mods: Coil Split Coil Tap
Volume Controls: 1 1
Tone Controls: 1 1