Sirius Ursa Major V2 vs Keychron B31
Get the Sirius Ursa Major V2 for hot-swappable and the 2,400 mAh battery.
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![[In Stock] Ursa Major V2 Wireless Aluminum Ultimate Keyboard](https://cdn.shopify.com/s/files/1/0549/0262/0278/files/6c52287aa620d9b01f572bd83c42e80.png?v=1755679989&width=3840&quality=75)
from$399at Velocifire
from$34at MK
90-day lowLowest price in 90 days
Which one should you get?
Get the
Keychron B31
Build quality in the bottom 20% of 75% boards under $50.
- Switches are soldered. Swapping them means soldering.
- No numpad.
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.
Sirius Ursa Major V2
Keychron B31
Connection
Bluetooth, Wired
Bluetooth, 2.4 GHz, Wired
Wireless for several devices and wired for lower latency
Hot-swappable
Yes
No
Switch changes without soldering
Battery
2,400 mAh
800 mAh
A larger battery means fewer cables during the day
Ergonomics
Split
Standard
Case material
Aluminum
ABS, Plastic
- Sirius Ursa Major V2
- Keychron B31
- Performance
- 6859
- Build quality
- 8252
- Productivity
- 9869
- Customizability
- 9147
- Portability
- 9079
- Max polling rate: 1,000 Hz
Sirius Ursa Major V2 vs Keychron B31 specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
14 of 27 specs differ
Sirius Ursa Major V2
Keychron B31
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
Typing angle
Backlight
QMK
VIA
N-key rollover
Mac & Windows
Released
Compare prices
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