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Compare AULA F99 vs Keychron K4 Max Differences Side by Side

This comparison is for buyers deciding between two popular 96% wireless mechanical keyboards. The AULA F99 and Keychron K4 Max share a compact layout with a numpad, tri-mode connectivity, and hot-swappable sockets, making the choice difficult. The decision hinges on whether you prioritize a specific typing feel and battery capacity or advanced software customization and gaming performance.

75
EPOMAKER x AULA F99
87
Keychron K4 Max QMK Wireless Mechanical Keyboard ISO Layout Collection

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4.8 (51)
5.0 (1)
  • Released in 2023
  • Has Linear switch options
  • Built with the ANSI layout standard
  • Connects via USB-C
  • Enables rapid trigger functionality
  • Uses a Gasket Mount mounting style
  • Equipped with a 8000 mAh battery
  • Weighs about 1023 g
  • Sized at 43 x 147 x 391 mm
  • Made with a ABS, Plastic, PBT case
  • Offers Yes, Rgb, North-face, Rgb North-face RGB lighting
  • Released in 2025
  • Has Linear, Tactile, Clicky switch options
  • Built with the ISO, ANSI layout standard
  • Provides dedicated media keys
  • Supports QMK firmware
  • Supports VIA configuration
  • Features N-key rollover
  • Uses a PCB Mount mounting style
  • Runs at a 1000 Hz polling rate
  • Equipped with a 4000 mAh battery
  • Weighs about 1290 g
  • Sized at 31 x 391 x 140 mm
  • Made with a ABS case
  • Offers Yes, Rgb, South-face, Rgb South-face, White, White South-face RGB lighting
Scores
  • Performance: 59.5
  • Build Quality: 63.1
  • Productivity: 89.1
  • Customizability: 72.9
  • Portability: 64.3
Scores
  • Performance: 82.1
  • Build Quality: 80.3
  • Productivity: 89.2
  • Customizability: 92.9
  • Portability: 50.9
Name
AULA F99
Name
Keychron K4 Max
Release year
2023
Release year
2025
Switch Options
Linear
Switch Options
Linear, Tactile, Clicky
Profile
Normal Profile
Profile
Normal Profile
Hot Swappable
 
Hot Swappable
 
Layout Size
96%
Layout Size
96%
Layout Standard
ANSI
Layout Standard
ISO, ANSI
Layout Ergonomics
Normal
Layout Ergonomics
Normal
Knob Support
 
Knob Support
 
Display Support
 
Display Support
 
Mac/Win Support
 
Mac/Win Support
 
Multi-Media Keys
 
Multi-Media Keys
 
USB-C
 
USB-C
 
USB passthrough
 
USB passthrough
 
Connection
Bluetooth, 2.4 GHz, Wired, Wireless
Connection
Bluetooth, 2.4 GHz, Wired, Wireless
Polling Rate
-
Polling Rate
1000 Hz
Battery capacity
8000 mAh
Battery capacity
4000 mAh
Hall Effect Support
 
Hall Effect Support
 
QMK Support
 
QMK Support
 
VIA Support
 
VIA Support
 
VIAL Support
 
VIAL Support
 
N-Key Rollover
 
N-Key Rollover
 
Rapid Trigger
 
Rapid Trigger
 
Mount Style
Gasket Mount
Mount Style
PCB Mount
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
Rgb, North-face
Backlight
 
Rgb, South-face, White, White South-face
Case Colors
Case Colors
Case Material
ABS, Plastic, PBT
Case Material
ABS
Keycaps Material
PBT
Keycaps Material
PBT
Dimensions
43 x 147 x 391 mm
Dimensions
31 x 391 x 140 mm
Weight
1023g
Weight
1290g
*Something incorrect or missing? Please
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Pros and Trade-offs

Your priority should guide your choice. If a specific, softer gasket-mounted typing feel, maximum wireless battery life, and a lighter build are most important, the AULA F99 is the better option. If deep firmware customization with QMK/VIA, a confirmed high polling rate for gaming, and switch variety are critical, the Keychron K4 Max is the clear winner. Both are competent pre-built keyboards, but they cater to different segments of the enthusiast market.

AULA F99

  • +Gasket mount structure with a flex-cut PCB for a softer, more responsive typing feel.
  • +Large 8000mAh battery capacity for extended wireless use.
  • +Includes multiple plate options (Polycarbonate and FR4) in different configurations for sound customization.
  • +Five layers of sound-dampening materials, including sandwich foam, IXPE pad, PET film, bottom foam, and a silicone case pad.
  • +Lighter weight (1023g) for better portability.
  • −Limited to linear switch options from the factory.
  • −Customization is confined to the proprietary AULA DRIVER software, which only supports Windows.
  • −Lacks a specified polling rate for gaming performance assessment.

Keychron K4 Max

  • +Full support for QMK and VIA open-source firmware for limitless key remapping and macros.
  • +Specifies a 1000 Hz polling rate in 2.4GHz and wired modes for low-latency gaming.
  • +Offers a choice of linear, tactile, or clicky switch types from Keychron.
  • +Features south-facing RGB LEDs, which are compatible with Cherry-profile keycaps without interference.
  • +Includes adjustable typing angles (3°, 7°, and 10°) for ergonomic positioning.
  • −Heavier weight (1290g) makes it less portable.
  • −Smaller 4000mAh battery compared to the AULA F99.
  • −Uses a standard PCB mount instead of a gasket mount, resulting in a firmer typing feel.

Which Keyboard Is Better for Your Needs?

The Keychron K4 Max is the stronger choice for gaming and programming due to its confirmed high polling rate and superior QMK/VIA programmability. The AULA F99 wins for travel thanks to its lighter weight and larger battery. For office use and content creation, both keyboards are equally capable, offering similar core layouts and connectivity. Modders will prefer the K4 Max for its firmware flexibility, though both offer physical hot-swap sockets.

GamingKeychron K4 Max
  • •The Keychron K4 Max lists a 1000 Hz polling rate for its 2.4GHz and wired modes.
  • •Its vendor description emphasizes low latency for competitive games.
  • •The AULA F99's listing does not specify a polling rate.
OfficeTie
  • •Both offer tri-mode connectivity (Bluetooth, 2.4GHz, wired) for flexible device switching.
  • •Both include Mac and Windows support with relevant keycaps.
  • •Both have sound-dampening features for a quieter environment.
ProgrammingKeychron K4 Max
  • •The Keychron K4 Max supports QMK and VIA firmware for extensive key remapping and macro creation.
  • •It also offers configuration via the Keychron Launcher web app.
  • •The AULA F99 is limited to its proprietary AULA DRIVER software for customization.
TravelAULA F99
  • •The AULA F99 is significantly lighter at 1023g compared to the K4 Max's 1290g.
  • •It has a larger 8000mAh battery, which the vendor claims offers long-lasting performance.
  • •Its slightly smaller depth (391mm vs the K4 Max's 391mm width) might fit better in some bags.
ModdingKeychron K4 Max
  • •The Keychron K4 Max supports open-source QMK firmware, allowing for deep firmware-level modifications.
  • •It uses a steel plate, which is a common modding preference for a firmer feel.
  • •While both are hot-swappable, the K4 Max's firmware support offers more customization layers.
Content CreationTie
  • •Both keyboards feature a 96% layout with a numpad, useful for shortcut keys and numerical input.
  • •Both offer RGB backlighting for visual customization in setups.
  • •Both have dedicated media keys or the capability to map them via software.

Frequently Asked Questions (FAQ)

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