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Head to head · Prices checked Oct 21, 2026

Royal Kludge F99 AI vs Jamesdonkey RS2 4.0

Get the Royal Kludge F99 AI for usb passthrough. Get the Jamesdonkey RS2 4.0 for knob and qmk.

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.

Royal Kludge F99 AI

Jamesdonkey RS2 4.0

  • Connection

    Wired

    Bluetooth, 2.4 GHz, Wired

  • Knob

    No

    Yes

  • Weight

    1,020 g

    1,150 g

  • QMK

    No

    Yes

  • USB passthrough

    Yes

    No

KeebFinder scores

How we score
  • Royal Kludge F99 AI
  • Jamesdonkey RS2 4.0
Performance
63
58
Build quality
50
71
Productivity
77
93
Customizability
60
82
Portability
45
53

What they share

  • Layout size: 96%
  • Hot-swappable
  • Switch options: Linear
  • Sound dampening
  • Keycaps: PBT
See every spec side by side

Full specs

Royal Kludge F99 AI vs Jamesdonkey RS2 4.0 specs

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

9 of 22 specs differ

Royal Kludge F99 AI

Jamesdonkey RS2 4.0

Typing & switches

Switch options

Linear
Linear

Hot-swappable

Yes
Yes

Mount style

—
Gasket Mount

Sound dampening

Yes
Yes

Layout

Layout size

96%
96%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Knob

No
Yes

Display

None
None

Media keys

No
Yes

Connectivity & battery

Connection

Wired
Bluetooth, 2.4 GHz, Wired

Battery

Wired only
4,000 mAh

USB passthrough

Yes
No

USB-C

Yes
Yes

Build & materials

Case material

—
Aluminum

Keycaps

PBT
PBT

Weight

1,020 g
1,150 g

Dimensions

43 x 391 x 147 mm
34 x 405 x 138 mm

Backlight

RGB, south-facing
RGB

Firmware & software

QMK

No
Yes

Mac & Windows

Yes
Yes

Extras

Released

2025
2024

Where to buy

Compare prices

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

Lowest price across stores, Amazon excluded.

  • Royal KludgeUS

    In stock
    $79Visit
  • AmazonGlobal

    Check price
    ~$79Visit
  • MechkeysCN

    In stock
    $99Visit
  • AmazonGlobal

    Check price
    ~$99Visit
  • WhatGeekCN

    Out of stock
    $108Visit

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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