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Head to head · Prices checked Nov 7, 2026

Keychron Q6 Max vs MMD KM40

Get the Keychron Q6 Max for the 4,000 mAh battery and knob.

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Quick verdict

Which one should you get?

Get the

Keychron Q6 Max

Battery

Build quality in the top 5% of 100% boards under $300.

Rules this board out

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

Get the

MMD KM40

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

Rules this board out

  • No ISO layout. ISO-DE, UK, and other ISO variants are not offered.
  • 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.

Keychron Q6 Max

MMD KM40

  • Layout size

    100%

    40%

  • Battery

    4,000 mAh

    2,000 mAh

    A larger battery means fewer cables during the day

  • Switch options

    Clicky, Linear, Tactile

    Linear, Tactile

  • Mount style

    Gasket Mount, PCB Mount

    Gasket Mount

  • Knob

    Yes

    No

KeebFinder scores

How we score
  • Keychron Q6 Max
  • MMD KM40
Performance
80
61
Build quality
91
82
Productivity
96
69
Customizability
100
83
Portability
54
84

What they share

  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Case material: Aluminum
  • QMK
  • VIA
  • Sound dampening
See every spec side by side

From real owners

What owners say

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

Keychron Q6 Max

3.7

26 owner reviews

Praise
“Amazing. Love the weight, keycaps, color. Knob placement could be much better. Spacebar leans to one side since I always press it on the right and gets uneven.”
JosephVerified buyer· via Keychron
Critique
“Keystrokes doesn’t have light instead a rainbow where i can’t focus when typing”
GunasVerified buyer· via Keychron

MMD KM40

5.0

4 owner reviews

Praise
“Keycaps are dyesub, but still PBT Tactile switches feature a proper tactile feeling with great typing experience The case feels and looks really premium layer activation could be nicer but in the end you just gotta get used to the board”
Andi· via MonacoKeys

Full specs

Keychron Q6 Max vs MMD KM40 specs

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

15 of 27 specs differ

Keychron Q6 Max

MMD KM40

Typing & switches

Switch options

Clicky, Linear, Tactile
Linear, Tactile

Hot-swappable

Yes
Yes

Mount style

Gasket Mount, PCB Mount
Gasket Mount

Sound dampening

Yes
Yes

Screw-in stabilizers

Yes
No

Layout

Layout size

100%
40%

Layout standard

ANSI, ISO, ISO-CH, ISO-DE, ISO-ES, ISO-FR, ISO-Nordic, ISO-SW, ISO-UK, JIS
ANSI

Ergonomics

Standard
Standard

Knob

Yes
No

Display

LED
None

Media keys

Yes
No

Connectivity & battery

Connection

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

Max polling rate

1,000 Hz
—

Battery

4,000 mAhBetter
2,000 mAh

USB-C

Yes
Yes

Build & materials

Case material

Aluminum
Aluminum

Plate material

Plastic, Polycarbonate
Polycarbonate

Keycaps

PBT
PBT

Weight

2,184 g
620 g

Dimensions

20 x 137 x 446 mm
—

Typing angle

5°
—

Backlight

RGB, south-facing
RGB

Firmware & software

QMK

Yes
Yes

VIA

Yes
Yes

N-key rollover

Yes
No

Mac & Windows

Yes
No

Extras

Released

2024
2026

For EU buyers

ISO layouts by store

Which stores sell ISO-DE, UK, and the other regional layouts.

Keychron Q6 Max

  • Keychron

    ISO-DE, ISO-UK, ISO-Nordic, ISO-CH

    Out of stockShips to you

  • Keychron (DE)

    ISO-DE, ISO-UK, ISO-FR, ISO-ES, ISO-CH

    Out of stockDoes not ship to you

  • Keychron (DE)

    ISO-DE, ISO-UK, ISO-FR, ISO-ES

    Out of stockDoes not ship to you

MMD KM40

No ISO layout at the stores we track.

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.

MMD KM402 stores

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