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Compare Firstblood B21 vs Keychron K2 QMK V3 Differences Side by Side

Explore the comprehensive side-by-side comparison of the Firstblood B21 and Keychron K2 QMK V3 and view their biggest differences. The detailed comparison table allows you to see all the essential features, specifications, and benefits of each keyboard at a glance. Whether you're looking for performance, value, or specific functionalities, this comparison tool helps you make an informed decision.

FirstBlood B21 Retro Mechanical Keyboard with Cherry Switch
-15% off
84
Keychron K2 QMK Wireless Mechanical Keyboard (ISO Layout) - Version 3

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  • Released in 2024
  • Has Clicky, Tactile, Linear switch options
  • Available in a 65% layout
  • Built with the ANSI layout standard
  • Weighs about 818 g
  • Sized at 46 x 148 x 317 mm
  • Offers Yes, White RGB lighting
  • Released in 2025
  • Has Tactile, Linear, Clicky switch options
  • Supports hot-swappable switches
  • Available in a 75% layout
  • Built with the ISO, ISO-UK, ISO-DE, ISO-ES, ISO-FR, ISO-Nordic, ISO-SW, ANSI layout standard
  • Provides dedicated media keys
  • Supports QMK firmware
  • Supports VIA configuration
  • Uses a PCB Mount mounting style
  • Equipped with a 4000 mAh battery
  • Offers Yes, Rgb, White RGB lighting
Scores
  • Performance: 56.5
  • Build Quality: 53.5
  • Productivity: 54.6
  • Customizability: 46.2
  • Portability: 83.1
Scores
  • Performance: 82
  • Build Quality: 78.6
  • Productivity: 80.4
  • Customizability: 89.9
  • Portability: 80.3
Name
Firstblood B21
Name
Keychron K2 QMK V3
Release year
2024
Release year
2025
Switch Options
Clicky, Tactile, Linear
Switch Options
Tactile, Linear, Clicky
Profile
Normal Profile
Profile
Normal Profile
Hot Swappable
 
Hot Swappable
 
Layout Size
65%
Layout Size
75%
Layout Standard
ANSI
Layout Standard
ISO, ISO-UK, ISO-DE, ISO-ES, ISO-FR, ISO-Nordic, ISO-SW, ANSI
Layout Ergonomics
Normal
Layout Ergonomics
Normal
Knob Support
 
Knob Support
 
Display Support
 
Display Support
 
Mac/Win Support
 
Mac/Win Support
 
Multi-Media Keys
 
Multi-Media Keys
 
USB-C
 
USB-C
 
USB passthrough
 
USB passthrough
 
Connection
Bluetooth, Wired, Wireless
Connection
Bluetooth, Wired, Wireless
Polling Rate
-
Polling Rate
-
Battery capacity
-
Battery capacity
4000 mAh
Hall Effect Support
 
Hall Effect Support
 
QMK Support
 
QMK Support
 
VIA Support
 
VIA Support
 
VIAL Support
 
VIAL Support
 
N-Key Rollover
 
N-Key Rollover
 
Rapid Trigger
 
Rapid Trigger
 
Mount Style
-
Mount Style
PCB Mount
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
White
Backlight
 
Rgb, White
Case Colors
Case Colors
Case Material
Aluminum
Case Material
Aluminum
Keycaps Material
PBT
Keycaps Material
PBT
Dimensions
46 x 148 x 317 mm
Dimensions
-
Weight
818g
Weight
-
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