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Head to head · Prices checked Oct 30, 2026

Jamesdonkey RS2 4.0 vs Keychron Q5 Ultra

Get the Jamesdonkey RS2 4.0 for qmk.

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Quick verdict

Which one should you get?

Get the

Jamesdonkey RS2 4.0

QMK

Build quality in the top 35% of 96% boards under $100.

Rules this board out

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

Get the

Keychron Q5 Ultra

Build quality in the top 35% of 96% boards under $300.

Rules this board out

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

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

Keychron Q5 Ultra

  • Switch options

    Linear

    Clicky, Linear, Tactile

  • Mount style

    Gasket Mount

    Gasket Mount, Plate Mount

  • Weight

    1,150 g

    2,098 g

    Heavier boards stay planted and lighter ones travel

  • QMK

    Yes

    No

    The deep option when you want to remap every key

  • Layout standard

    ANSI

    ANSI, ISO, ISO-DE, ISO-ES

    ISO and JIS exist so regional layouts fit

KeebFinder scores

How we score
  • Jamesdonkey RS2 4.0
  • Keychron Q5 Ultra
Performance
58
89
Build quality
71
74
Productivity
93
90
Customizability
82
77
Portability
53
56

What they share

  • Layout size: 96%
  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Battery: 4,000 mAh
  • Case material: Aluminum
  • Knob
See every spec side by side

Full specs

Jamesdonkey RS2 4.0 vs Keychron Q5 Ultra specs

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

10 of 26 specs differ

Jamesdonkey RS2 4.0

Keychron Q5 Ultra

Typing & switches

Switch options

Linear
Clicky, Linear, Tactile

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Gasket Mount, Plate Mount

Sound dampening

Yes
Yes

Screw-in stabilizers

No
Yes

Layout

Layout size

96%
96%

Layout standard

ANSI
ANSI, ISO, ISO-DE, ISO-ES

Ergonomics

Standard
Standard

Knob

Yes
Yes

Display

None
None

Media keys

Yes
Yes

Connectivity & battery

Connection

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

Max polling rate

—
8,000 Hz

Battery

4,000 mAh
4,000 mAh

USB-C

Yes
Yes

Build & materials

Case material

Aluminum
Aluminum

Plate material

—
Polycarbonate

Keycaps

PBT
PBT

Weight

1,150 g
2,098 g

Dimensions

34 x 405 x 138 mm
32 x 408 x 145 mm

Typing angle

—
5°

Backlight

RGB
RGB, south-facing

Firmware & software

QMK

Yes
No

N-key rollover

No
Yes

Mac & Windows

Yes
Yes

Extras

Released

2024
2026

For EU buyers

ISO layouts by store

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

Jamesdonkey RS2 4.0

No ISO layout at the stores we track.

Keychron Q5 Ultra

  • Keychron (DE)

    ISO-DE, ISO-ES

    In stockDoes not ship to you

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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