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Head to head · Prices checked Nov 11, 2026

Jamesdonkey RS2 4.0 vs Royal Kludge S98 ES

Get the Jamesdonkey RS2 4.0 for the 4,000 mAh battery and qmk.

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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

Royal Kludge S98 ES

  • Battery

    4,000 mAh

    3,750 mAh

    A larger battery means fewer cables during the day

  • Mount style

    Gasket Mount

    Top Mount

  • Display

    None

    LCD

    A case display rather than a typing feature

  • Weight

    1,150 g

    1,879 g

    Heavier boards stay planted and lighter ones travel

  • QMK

    Yes

    No

    The deep option when you want to remap every key

KeebFinder scores

How we score
  • Jamesdonkey RS2 4.0
  • Royal Kludge S98 ES
Performance
57
78
Build quality
70
69
Productivity
93
91
Customizability
82
79
Portability
53
56

What they share

  • Layout size: 96%
  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Knob
  • Sound dampening
See every spec side by side

Full specs

Jamesdonkey RS2 4.0 vs Royal Kludge S98 ES specs

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

12 of 24 specs differ

Jamesdonkey RS2 4.0

Royal Kludge S98 ES

Typing & switches

Switch options

Linear
—

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Top Mount

Sound dampening

Yes
Yes

Screw-in stabilizers

No
Yes

Layout

Layout size

96%
96%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Knob

Yes
Yes

Display

None
LCD

Media keys

Yes
No

Connectivity & battery

Connection

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

Battery

4,000 mAhBetter
3,750 mAh

USB passthrough

No
Yes

USB-C

Yes
Yes

Build & materials

Case material

Aluminum
—

Keycaps

PBT
ABS

Weight

1,150 g
1,879 g

Dimensions

34 x 405 x 138 mm
42 x 409 x 140 mm

Backlight

RGB
RGB

Firmware & software

QMK

Yes
No

N-key rollover

No
Yes

Mac & Windows

Yes
Yes

Extras

Released

2024
2025

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.

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