AULA F99 Pro vs Keychron K4 MaxGasket Mount vs QMK Customization
Choose the AULA F99 Pro for a softer, pre-tuned typing experience and longer battery life, or the Keychron K4 Max for deep firmware customization and a more rigid feel.
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4.7 (41)4.7 · 41 reviews
from$68at Epomaker
90-day lowLowest price in 90 days
5.0 (1)5.0 · 1 reviews
from$99at Keychron
Which one should you get?
Get the
AULA F99 Pro
Gasket Mount
Build quality in the bottom 50% of 96% boards under $100.
- Gasket mount structure with a PC plate for a softer, more flexible typing feel.
- Larger 8000mAh battery capacity for extended wireless use.
- Includes five layers of sound-dampening materials like sandwich foam, IXPE switch pad, and PET film.
- South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
- No ISO layout. ISO-DE, UK, and other ISO variants are not offered.
Get the
Keychron K4 Max
QMK Customization
Build quality in the top 20% of 96% boards under $100.
- Full support for QMK and VIA open-source firmware for limitless key remapping.
- Built with a steel plate and screw-in stabilizers for a solid, stable feel.
- Includes double-shot PBT keycaps in an OSA profile for better durability.
- South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
Your decision rests on the core trade-off between acoustic tuning and software freedom. The AULA F99 Pro is the better out-of-the-box experience for those who want a softer, quieter typing feel and longer battery life without needing to mod. The Keychron K4 Max is the superior choice for enthusiasts who value programmability above all, offering QMK/VIA support, a sturdier build with a steel plate, and more switch variety. Prioritize typing feel and battery for the F99 Pro; prioritize customization and a precise, rigid response for the K4 Max.
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 Pro
Keychron K4 Max
Battery
8,000 mAh
4,000 mAh
A larger battery means fewer cables during the day
Switch options
Linear
Clicky, Linear, Tactile
Mount style
Gasket Mount
PCB Mount
Knob
Yes
No
Weight
1,023 g
1,290 g
Heavier boards stay planted and lighter ones travel
- AULA F99 Pro
- Keychron K4 Max
- Performance
- 6682
- Build quality
- 6280
- Productivity
- 8389
- Customizability
- 6692
- Portability
- 6351
- Layout size: 96%
- Connection: Bluetooth, 2.4 GHz, Wired
- Hot-swappable
- Case material: ABS
- Sound dampening
What will you mostly use it for?
The Keychron K4 Max wins for gaming due to its specified polling rate, and is the clear choice for programming and modding thanks to QMK/VIA support. The AULA F99 Pro is better for travel because of its lower weight and larger battery. For office use and content creation, the decision is a tie, hinging on whether you prioritize battery life and acoustics or keycap durability and software customization.
Pick the Keychron K4 Max
- The Keychron K4 Max lists a 1000 Hz polling rate for its 2.4 GHz and wired modes.
- Its vendor page claims the polling rate makes latency 'hardly noticeable even in competitive games'.
- The steel plate may provide a more immediate, consistent keypress feedback compared to the F99 Pro's PC plate.
What owners say
Ratings and quotes collected from verified store reviews, including the critical ones.
AULA F99 Pro
41 owner reviews
“I got the Aula F99 pro 2 of them and 2 of the Aula black mice. Most amazing keyboard and mouse. I use them with my Galaxy phone with Samsung Dex, as well my gaming pc.”
“JUNK GARBAGE TRASH. What can I say. I cant type on it and I cant use it. TOSSING IT”
Keychron K4 Max
1 owner reviews
AULA F99 Pro vs Keychron K4 Max specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
15 of 27 specs differ
AULA F99 Pro
Keychron K4 Max
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
ISO layouts by store
Which stores sell ISO-DE, UK, and the other regional layouts.
AULA F99 Pro
No ISO layout at the stores we track.
Keychron K4 Max
Keychron
ISO
In stockShips to you
Compare prices
Live prices from the stores we track, cheapest in-stock offer first.
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Lowest price across stores, Amazon excluded.
AULA F99 Pro vs Keychron K4 Max: your questions
The AULA F99 Pro has a larger 8000mAh battery, while the Keychron K4 Max has a 4000mAh battery. The vendor for the F99 Pro claims this allows for 'sustained performance', suggesting it will last longer between charges under similar usage conditions.
Yes. The Keychron K4 Max supports QMK and VIA firmware. According to its product page, this allows for endless key remapping, macros, and shortcuts through the Keychron Launcher web app or directly via QMK.
Yes. The AULA F99 Pro uses the proprietary AULA Driver software. The vendor description states you can customize key mapping, RGB effects, and macros with this software.
The AULA F99 Pro is designed with acoustics as a primary focus. Its vendor description details five layers of sound-improving materials, including sandwich foam, an IXPE switch pad, PET film, bottom foam, and a silicone case pad, which are intended to eliminate echoes and provide a pure typing sound.
Yes. The Keychron K4 Max comes with double-shot PBT keycaps in an OSA profile, which are more resistant to oil and shine. The AULA F99 Pro uses Cherry-profile keycaps, but the material is not specified in the provided information.
Yes, both keyboards feature hot-swappable PCBs. The Keychron K4 Max vendor page explicitly states compatibility with 'almost all of the 3pin and 5pin MX style mechanical switches on the market (including Cherry, Gateron, Kailh, Panda, etc.)'.
Both keyboards list Mac support and include relevant keycaps. The Keychron K4 Max vendor specifically notes it is 'built with the Mac users’ experience in mind' and includes an extra set of keycaps for macOS, along with a system toggle switch.
The AULA F99 Pro uses a gasket mount with a flexible PC plate, aiming for a softer, more cushioned feel. The Keychron K4 Max uses a PCB mount with a steel plate, which typically results in a firmer, more rigid and responsive typing experience.
Yes, both the AULA F99 Pro and the Keychron K4 Max include a rotary knob, which can be used for media control or other customizable functions.
The Keychron K4 Max lists a 1000 Hz polling rate in its 2.4 GHz and wired modes. Its manufacturer claims this makes 'the latency hardly noticeable even in competitive games', which suggests it is designed with gaming performance in mind.
The AULA F99 Pro is more portable. It weighs 1023g compared to the Keychron K4 Max's 1290g, making it significantly lighter to carry. Both have a similar 96% footprint.
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