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Head to head · Prices checked Nov 10, 2026

AULA F75 Ultra vs Redragon PENUMBRA K687

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Quick verdict

Which one should you get?

Get the

AULA F75 Ultra

VIA

Build quality in the top 40% of 75% boards under $100.

Rules this board out

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

Get the

Redragon PENUMBRA K687

Build quality in the top 35% of 75% boards under $100.

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 F75 Ultra

Redragon PENUMBRA K687

  • Connection

    Bluetooth, 2.4 GHz, Wired

    Wired

    Wireless for several devices and wired for lower latency

  • Case material

    ABS

    Aluminum

  • Weight

    1,100 g

    1,500 g

    Heavier boards stay planted and lighter ones travel

  • VIA

    Yes

    No

    GUI remapping without compiling firmware

  • Backlight

    RGB, south-facing

    RGB

    RGB for looks and low light rather than speed

KeebFinder scores

How we score
  • AULA F75 Ultra
  • Redragon PENUMBRA K687
Performance
81
79
Build quality
72
73
Productivity
89
71
Customizability
78
61
Portability
91
60

What they share

  • Layout size: 75%
  • Hot-swappable
  • Switch options: Linear
  • Mount style: Gasket Mount
  • Knob
  • Sound dampening
See every spec side by side

Full specs

AULA F75 Ultra vs Redragon PENUMBRA K687 specs

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

8 of 24 specs differ

AULA F75 Ultra

Redragon PENUMBRA K687

Typing & switches

Switch options

Linear
Linear

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Gasket Mount

Sound dampening

Yes
Yes

Layout

Layout size

75%
75%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Knob

Yes
Yes

Display

None
None

Connectivity & battery

Connection

Bluetooth, 2.4 GHz, Wired
Wired

Max polling rate

1,000 Hz
—

Battery

10,000 mAh
Wired only

USB-C

Yes
Yes

Build & materials

Case material

ABS
Aluminum

Plate material

Polycarbonate
—

Keycaps

PBT, PC
—

Weight

1,100 g
1,500 g

Dimensions

43 x 323 x 143 mm
43 x 133 x 43 mm

Typing angle

10°
—

Backlight

RGB, south-facing
RGB

Firmware & software

VIA

Yes
No

N-key rollover

Yes
Yes

Mac & Windows

Yes
No

Extras

Released

2026
2025

Where to buy

Compare prices

Live prices from the stores we track, cheapest in-stock offer first.

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Lowest price across stores, Amazon excluded.

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