Jamesdonkey RS2 4.0 vs Keychron K4 Ultra
Get the Jamesdonkey RS2 4.0 for knob.
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No reviews
from$99at Mechkeys
5.0 (2)5.0 · 2 reviews
from$114at Keychron
Which one should you get?
Get the
Keychron K4 Ultra
Build quality in the bottom 40% of 96% boards under $150.
- South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
The differences that matter
Skip the 40-row spec sheet. These are the specs that change how each board feels, sounds, and fits your desk.
Jamesdonkey RS2 4.0
Keychron K4 Ultra
Case material
Aluminum
ABS
Switch options
Linear
Clicky, Linear, Tactile
Mount style
Gasket Mount
Plate Mount
Knob
Yes
No
Weight
1,150 g
1,241 g
Heavier boards stay planted and lighter ones travel
- Jamesdonkey RS2 4.0
- Keychron K4 Ultra
- Performance
- 5888
- Build quality
- 7163
- Productivity
- 9387
- Customizability
- 8275
- Portability
- 5357
- Layout size: 96%
- Connection: Bluetooth, 2.4 GHz, Wired
- Hot-swappable
- Battery: 4,000 mAh
- Sound dampening
- Keycaps: PBT
Jamesdonkey RS2 4.0 vs Keychron K4 Ultra specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
11 of 25 specs differ
Jamesdonkey RS2 4.0
Keychron K4 Ultra
Switch options
Hot-swappable
Mount style
Sound dampening
Screw-in stabilizers
Layout size
Layout standard
Ergonomics
Knob
Display
Media keys
Connection
Max polling rate
Battery
USB-C
Case material
Plate material
Keycaps
Weight
Dimensions
Backlight
QMK
N-key rollover
Mac & Windows
Released
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