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Head to head · Prices checked Oct 30, 2026

AULA F99 vs Keychron B31

Get the AULA F99 for rapid trigger and hot-swappable.

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Quick verdict

Which one should you get?

Get the

AULA F99

Rapid trigger

Build quality in the bottom 40% of 96% boards under $100.

Rules this board out

  • North-facing LEDs. Cherry-profile keycaps can hit the switch housing.
  • Compact full-size layout. The numpad is present, the gaps of a full-size board are not.

Get the

Keychron B31

Build quality in the bottom 20% of 75% boards under $50.

Rules this board out

  • Switches are soldered. Swapping them means soldering.
  • No numpad.

What actually differs

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

Keychron B31

  • Layout size

    96%

    75%

  • Rapid trigger

    Yes

    No

    Faster resets help in games and not in normal typing

  • Hot-swappable

    Yes

    No

    Switch changes without soldering

  • Battery

    8,000 mAh

    800 mAh

    A larger battery means fewer cables during the day

  • Case material

    ABS, PBT, Plastic

    ABS, Plastic

KeebFinder scores

How we score
  • AULA F99
  • Keychron B31
Performance
58
59
Build quality
56
52
Productivity
87
69
Customizability
65
46
Portability
62
79

What they share

  • Connection: Bluetooth, 2.4 GHz, Wired
See every spec side by side

Full specs

AULA F99 vs Keychron B31 specs

Every tracked spec, side by side. Rows marked with a dot differ between the boards.

16 of 25 specs differ

AULA F99

Keychron B31

Typing & switches

Switch options

Linear
Clicky, Linear, Tactile

Rapid trigger

Yes
No

Hot-swappable

Yes
No

Mount style

Gasket Mount
PCB Mount

Sound dampening

Yes
No

Screw-in stabilizers

Yes
No

Layout

Layout size

96%
75%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Display

None
None

Media keys

No
Yes

Connectivity & battery

Connection

Bluetooth, 2.4 GHz, Wired
Bluetooth, 2.4 GHz, Wired

Max polling rate

—
1,000 Hz

Battery

8,000 mAhBetter
800 mAh

USB-C

Yes
Yes

Build & materials

Case material

ABS, PBT, Plastic
ABS, Plastic

Plate material

FR4, Plastic, Polycarbonate
—

Keycaps

PBT
ABS

Weight

1,023 g
520 g

Dimensions

43 x 147 x 391 mm
26 x 138 x 327 mm

Typing angle

—
5°

Backlight

RGB, north-facing
None

Firmware & software

N-key rollover

No
Yes

Mac & Windows

Yes
Yes

Extras

Released

2023
2026

Where to buy

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.

AULA F994 stores
Keychron B314 stores

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