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Head to head · Prices checked Oct 21, 2026

MMD KM40 vs Yunzii B98 PRO

Get the Yunzii B98 PRO for the 8,000 mAh battery and knob.

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.

MMD KM40

Yunzii B98 PRO

  • Layout size

    40%

    96%

  • Battery

    2,000 mAh

    8,000 mAh

  • Case material

    Aluminum

    Metal, Plastic

  • Switch options

    Linear, Tactile

    Linear

  • Knob

    No

    Yes

KeebFinder scores

How we score
  • MMD KM40
  • Yunzii B98 PRO
Performance
61
84
Build quality
83
82
Productivity
69
93
Customizability
84
94
Portability
84
62

What they share

  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Mount style: Gasket Mount
  • 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.

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

Yunzii B98 PRO

No owner reviews collected yet.

Full specs

MMD KM40 vs Yunzii B98 PRO specs

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

13 of 25 specs differ

MMD KM40

Yunzii B98 PRO

Typing & switches

Switch options

Linear, Tactile
Linear

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Gasket Mount

Sound dampening

Yes
Yes

Layout

Layout size

40%
96%

Layout standard

ANSI
ANSI, ISO, ISO-DE, ISO-FR

Ergonomics

Standard
Standard

Knob

No
Yes

Display

None
OLED, LED

Media keys

No
Yes

Connectivity & battery

Connection

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

Max polling rate

—
1,000 Hz

Battery

2,000 mAh
8,000 mAhBetter

USB-C

Yes
Yes

Build & materials

Case material

Aluminum
Metal, Plastic

Plate material

Polycarbonate
Aluminum

Keycaps

PBT
PBT

Weight

620 g
1,188 g

Dimensions

—
49 x 414 x 142 mm

Backlight

RGB
RGB, south-facing

Firmware & software

QMK

Yes
Yes

VIA

Yes
Yes

N-key rollover

No
Yes

Mac & Windows

No
Yes

Extras

Released

2026
2026

Where to buy

Compare prices

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

Lowest price across stores, Amazon excluded.

MMD KM402 stores
  • MonacoKeysDE

    In stock
    $84Visit
  • AmazonGlobal

    Check price
    ~$84Visit
  • YunziiCN

    In stock
    $91Visit
  • AmazonGlobal

    Check price
    Visit

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