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Head to head · Prices checked Oct 28, 2026

AULA F108 Pro V2 vs Keychron K4 Ultra

Get the AULA F108 Pro V2 for the 10,000 mAh battery.

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Quick verdict

Which one should you get?

Get the

AULA F108 Pro V2

Battery

Build quality in the top 25% of 100% boards under $150.

Rules this board out

  • South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.

Get the

Keychron K4 Ultra

Build quality in the bottom 40% of 96% boards under $150.

Rules this board out

  • South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
  • Compact full-size layout. The numpad is present, the gaps of a full-size board are not.

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 F108 Pro V2

Keychron K4 Ultra

  • Layout size

    100%

    96%

  • Battery

    10,000 mAh

    4,000 mAh

    A larger battery means fewer cables during the day

  • Case material

    ABS, Plastic

    ABS

  • Switch options

    Linear

    Clicky, Linear, Tactile

  • Mount style

    Gasket Mount

    Plate Mount

KeebFinder scores

How we score
  • AULA F108 Pro V2
  • Keychron K4 Ultra
Performance
88
88
Build quality
65
63
Productivity
75
87
Customizability
68
75
Portability
66
57

What they share

  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Max polling rate: 8,000 Hz
  • Sound dampening
  • Keycaps: PBT
See every spec side by side

From real owners

What owners say

Ratings and quotes collected from verified store reviews, including the critical ones.

AULA F108 Pro V2

4.3

3 owner reviews

Praise
“just received the keyboard. I am so happy with it!! I chose the Cotton Candy switches, and this is exactly what I was looking for. I had tried other mechanical keyboards before, but they were never quite what I wanted. These switches are so soft and feel…”
JennyQVerified buyer· via Epomaker
Critique
“The overall build quality and the feel is amazing but it sometimes restarts itself for no apparent reason (every 3h or so) when used wired.”
Mateusz S.Verified buyer· via Epomaker

Keychron K4 Ultra

5.0

2 owner reviews

Praise
“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.”
AnonymousVerified buyer· via Keychron

Full specs

AULA F108 Pro V2 vs Keychron K4 Ultra specs

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

11 of 23 specs differ

AULA F108 Pro V2

Keychron K4 Ultra

Typing & switches

Switch options

Linear
Clicky, Linear, Tactile

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Plate Mount

Sound dampening

Yes
Yes

Screw-in stabilizers

No
Yes

Layout

Layout size

100%
96%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Display

LCD
None

Media keys

No
Yes

Connectivity & battery

Connection

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

Max polling rate

8,000 Hz
8,000 Hz

Battery

10,000 mAhBetter
4,000 mAh

USB-C

Yes
Yes

Build & materials

Case material

ABS, Plastic
ABS

Plate material

Polycarbonate
Steel

Keycaps

PBT
PBT

Weight

1,329 g
1,241 g

Dimensions

43 x 443 x 139 mm
31 x 391 x 140 mm

Backlight

RGB, south-facing
RGB, south-facing

Firmware & software

N-key rollover

Yes
Yes

Mac & Windows

Yes
Yes

Extras

Released

2026
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.

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