Keychron K4 Pro vs Vgn S99
Get the Vgn S99 for the 6,000 mAh battery.
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.
Keychron K4 Pro
Vgn S99
Connection
Bluetooth, Wired
Bluetooth, 2.4 GHz, Wired
Battery
4,000 mAh
6,000 mAh
Case material
ABS, Plastic
Plastic
Switch options
Clicky, Linear, Tactile
Linear
Mount style
Tray Mount
Gasket Mount
- Keychron K4 Pro
- Vgn S99
- Performance
- 8159
- Build quality
- 8452
- Productivity
- 9562
- Customizability
- 9659
- Portability
- 5459
- Layout size: 96%
- Hot-swappable
- Max polling rate: 1,000 Hz
- Sound dampening
What owners say
Ratings and quotes collected from verified store reviews, including the critical ones.
Keychron K4 Pro
7 owner reviews
“I previously had a normal K4 and i love the new one, the only thing is that the stabilizers lube work is kinda bad and the space bar was very rattly but after some lube work the K4 pro retakes the perfect productivity keyboard.”
Vgn S99
No owner reviews collected yet.
Keychron K4 Pro vs Vgn S99 specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
16 of 26 specs differ
Keychron K4 Pro
Vgn S99
Switch options
Hot-swappable
Mount style
Sound dampening
Screw-in stabilizers
Layout size
Layout standard
Ergonomics
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
Live prices from the stores we track, cheapest in-stock offer first.
Lowest price across stores, Amazon excluded.
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