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Compare MMD KM21 Ultra vs Realforce Topre RT1 Numpad Differences Side by Side

Explore the comprehensive side-by-side comparison of the MMD KM21 Ultra and Realforce Topre RT1 Numpad 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.

86
MMD KM21 Ultra - QMK/VIA Wireless Aluminium Macropad Numpad
Topre Realforce RT1 Numpad Keyboard

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  • Released in 2026
  • Supports hot-swappable switches
  • Comes with a knob
  • Connects via USB-C
  • Supports QMK firmware
  • Supports VIA configuration
  • Has built-in sound dampening
  • Uses a Top Mount mounting style
  • Supports Bluetooth, 2.4 GHz, Wired, Wireless connectivity
  • Equipped with a 980 mAh battery
  • Made with a Aluminum case
  • Offers Yes, Rgb RGB lighting
  • Released in 2025
  • Features N-key rollover
  • Supports Wired, Wired only connectivity
  • Made with a Plastic case
  • Features PBT keycaps
  • Offers No RGB lighting
Scores
  • Performance: 66.1
  • Build Quality: 81.8
  • Productivity: 89.3
  • Customizability: 89.9
  • Portability: 85.7
Scores
  • Performance: 51.9
  • Build Quality: 43.1
  • Productivity: 45.7
  • Customizability: 42.8
  • Portability: 66.2
Name
MMD KM21 Ultra
Name
Realforce Topre RT1 Numpad
Release year
2026
Release year
2025
Switch Options
-
Switch Options
-
Profile
Normal Profile
Profile
Normal Profile
Hot Swappable
 
Hot Swappable
 
Layout Size
Numpad
Layout Size
Numpad
Layout Standard
ANSI
Layout Standard
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, 2.4 GHz, Wired, Wireless
Connection
Wired, Wired only
Polling Rate
-
Polling Rate
-
Battery capacity
980 mAh
Battery capacity
-
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
Top Mount
Mount Style
-
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
Rgb
Backlight
 
Case Colors
Case Colors
Case Material
Aluminum
Case Material
Plastic
Keycaps Material
-
Keycaps Material
PBT
Dimensions
-
Dimensions
-
Weight
-
Weight
-
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