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Head to head · Prices checked Nov 7, 2026

KBDFans Cat vs MMD KM40

Get the MMD KM40 for hot-swappable and qmk.

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Quick verdict

Which one should you get?

Get the

KBDFans Cat

Rules this board out

  • Switches are soldered. Swapping them means soldering.
  • Compact layout only. No function row, dedicated arrow keys, or numpad.

Get the

MMD KM40

Hot-swappable

Build quality in the top 10% of 40% boards under $150.

Rules this board out

  • Compact layout only. No function row, dedicated arrow keys, or 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.

KBDFans Cat

MMD KM40

  • Layout size

    60%

    40%

  • Hot-swappable

    No

    Yes

    Switch changes without soldering

  • QMK

    No

    Yes

    The deep option when you want to remap every key

  • VIA

    No

    Yes

    GUI remapping without compiling firmware

  • Sound dampening

    No

    Yes

KeebFinder scores

How we score
  • KBDFans Cat
  • MMD KM40
Performance
43
61
Build quality
53
82
Productivity
41
69
Customizability
49
83
Portability
63
84
See every spec side by side

Full specs

KBDFans Cat vs MMD KM40 specs

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

7 of 19 specs differ

KBDFans Cat

MMD KM40

Typing & switches

Switch options

—
Linear, Tactile

Hot-swappable

No
Yes

Mount style

—
Gasket Mount

Sound dampening

No
Yes

Layout

Layout size

60%
40%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Display

None
None

Connectivity & battery

Connection

—
Bluetooth, 2.4 GHz, Wired

Battery

—
2,000 mAh

USB-C

No
Yes

Build & materials

Case material

—
Aluminum

Plate material

—
Polycarbonate

Keycaps

—
PBT

Weight

—
620 g

Backlight

None
RGB

Firmware & software

QMK

No
Yes

VIA

No
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.

KBDFans Cat2 stores
MMD KM402 stores

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