AULA F99 Max vs Keychron K4 Ultra
Get the AULA F99 Max for the 8,000 mAh battery and knob. Get the Keychron K4 Ultra for the 8,000 Hz polling rate.
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4.5 (2)4.5 · 2 reviews
from$84at Epomaker
90-day lowLowest price in 90 days
5.0 (2)5.0 · 2 reviews
from$114at Keychron
Which one should you get?
Get the
AULA F99 Max
Battery
Build quality in the top 40% of 96% boards under $100.
- South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
Get the
Keychron K4 Ultra
polling rate
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.
AULA F99 Max
Keychron K4 Ultra
Battery
8,000 mAh
4,000 mAh
A larger battery means fewer cables during the day
Max polling rate
1,000 Hz
8,000 Hz
Higher polling helps competitive FPS and does nothing for typing
Switch options
Linear
Clicky, Linear, Tactile
Mount style
Gasket Mount
Plate Mount
Knob
Yes
No
- AULA F99 Max
- Keychron K4 Ultra
- Performance
- 6688
- Build quality
- 6963
- Productivity
- 8387
- Customizability
- 7375
- Portability
- 6357
- Layout size: 96%
- Connection: Bluetooth, 2.4 GHz, Wired
- Hot-swappable
- Case material: ABS
- Sound dampening
- Keycaps: PBT
What owners say
Ratings and quotes collected from verified store reviews, including the critical ones.
AULA F99 Max
2 owner reviews
“Wish is had like a thickly more creamy sound but gets the job done”
Keychron K4 Ultra
2 owner reviews
“Quality keyboard. I just wish the indicator lights for caps lock and num lock was brighter. Even tried increasing it on the software but it isn't enough.”
AULA F99 Max vs Keychron K4 Ultra specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
12 of 24 specs differ
AULA F99 Max
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
N-key rollover
Mac & Windows
Released
Compare prices
Live prices from the stores we track, cheapest in-stock offer first.
Prices in USD are converted to your currency and can change at any time. KeebFinder may earn a commission when you buy through these links, at no extra cost to you.
Lowest price across stores, Amazon excluded.
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