Head to head · Prices checked Nov 10, 2026

Jamesdonkey R4 vs Womier RD75 Pro

Get the Jamesdonkey R4 for knob. Get the Womier RD75 Pro for the 8,000 mAh battery and via.

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Knob

from$166at Mechkeys

Battery

from$165at ktechs

Quick verdict

Which one should you get?

Get the

Jamesdonkey R4

Knob

Build quality in the bottom 50% of 75% boards under $200.

Rules this board out

South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
No ISO layout. ISO-DE, UK, and other ISO variants are not offered.

$166 at Mechkeys

Get the

Womier RD75 Pro

Battery

Build quality in the top 20% of 75% boards under $200.

Rules this board out

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

$165 at ktechs

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 R4

Womier RD75 Pro

Battery
4,000 mAh
8,000 mAh
A larger battery means fewer cables during the day
Knob
Yes
No
Weight
1,900 g
2,000 g
Heavier boards stay planted and lighter ones travel
VIA
No
Yes
GUI remapping without compiling firmware
Sound dampening
No
Yes

KeebFinder scores

How we score

Jamesdonkey R4
Womier RD75 Pro

Performance: 54
80
Build quality: 67
81
Productivity: 63
89
Customizability: 79
86
Portability: 77
92

What they share

Layout size: 75%
Connection: Bluetooth, 2.4 GHz, Wired
Hot-swappable
Case material: Aluminum
Mount style: Gasket Mount
QMK

See every spec side by side

Full specs

Jamesdonkey R4 vs Womier RD75 Pro specs

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

10 of 24 specs differ

Spec

Jamesdonkey R4

Womier RD75 Pro

Typing & switches

Hot-swappable

Yes

Mount style

Gasket Mount

Sound dampening

Yes

Layout

Layout size

75%

Layout standard

ANSI

ANSI, ISO

Ergonomics

Standard

Knob

Yes

Display

None

Media keys

Yes

Connectivity & battery

Connection

Bluetooth, 2.4 GHz, Wired

Max polling rate

—

1,000 Hz

Battery

4,000 mAh

8,000 mAhBetter

USB-C

Yes

Build & materials

Case material

Aluminum

Plate material

—

FR4

Keycaps

PBT

Weight

1,900 g

2,000 g

Dimensions

45 x 150 x 329 mm

—

Backlight

RGB, south-facing

Firmware & software

QMK

Yes

VIA

Yes

N-key rollover

Yes

Mac & Windows

Yes

Extras

Released

2024

For EU buyers

ISO layouts by store

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

Jamesdonkey R4

No ISO layout at the stores we track.

Womier RD75 Pro

Listed on the product, not split by store: ISO.

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.

Jamesdonkey R42 stores