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Head to head · Prices checked Oct 21, 2026

Jamesdonkey RS2 4.0 vs Yunzii YZ98

Get the Jamesdonkey RS2 4.0 for knob and qmk. Get the Yunzii YZ98 for the 4,600 mAh battery.

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.

Jamesdonkey RS2 4.0

Yunzii YZ98

  • Layout size

    96%

    98%

  • Battery

    4,000 mAh

    4,600 mAh

  • Knob

    Yes

    No

  • Weight

    1,150 g

    1,050 g

  • QMK

    Yes

    No

KeebFinder scores

How we score
  • Jamesdonkey RS2 4.0
  • Yunzii YZ98
Performance
58
58
Build quality
71
47
Productivity
93
76
Customizability
82
58
Portability
53
54

What they share

  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Switch options: Linear
  • Mount style: Gasket Mount
  • Sound dampening
  • Keycaps: PBT
See every spec side by side

Full specs

Jamesdonkey RS2 4.0 vs Yunzii YZ98 specs

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

9 of 23 specs differ

Jamesdonkey RS2 4.0

Yunzii YZ98

Typing & switches

Switch options

Linear
Linear

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Gasket Mount

Sound dampening

Yes
Yes

Layout

Layout size

96%
98%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Knob

Yes
No

Display

None
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 mAh
4,600 mAhBetter

USB-C

Yes
Yes

Build & materials

Case material

Aluminum
—

Keycaps

PBT
PBT

Weight

1,150 g
1,050 g

Dimensions

34 x 405 x 138 mm
39 x 390 x 147 mm

Backlight

RGB
RGB, south-facing

Firmware & software

QMK

Yes
No

N-key rollover

No
Yes

Mac & Windows

Yes
Yes

Extras

Released

2024
2024

Where to buy

Compare prices

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

Lowest price across stores, Amazon excluded.

  • MechkeysCN

    In stock
    $99Visit
  • AmazonGlobal

    Check price
    ~$99Visit
  • WhatGeekCN

    Out of stock
    $108Visit
Yunzii YZ983 stores
  • MechkeysCN

    In stock
    $95Visit
  • AmazonGlobal

    Check price
    ~$95Visit
  • YunziiCN

    Out of stock
    $45Visit

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.

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