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Head to head · Prices checked Nov 11, 2026

Keychron Q2 vs Redragon CASTOR K631 Pro SE

Get the Keychron Q2 for knob.

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Quick verdict

Which one should you get?

Get the

Keychron Q2

Knob

Build quality in the top 5% of 65% boards under $100.

Rules this board out

  • South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
$59 at Keychron

Get the

Redragon CASTOR K631 Pro SE

Build quality in the bottom 25% of 65% boards under $100.

Rules this board out

  • No ISO layout. ISO-DE, UK, and other ISO variants are not offered.
$62 at Redragon

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.

Keychron Q2

Redragon CASTOR K631 Pro SE

  • Connection

    Wired

    Bluetooth, 2.4 GHz, Wired

    Wireless for several devices and wired for lower latency

  • Case material

    Aluminum

    Plastic

  • Switch options

    Clicky, Linear, Tactile

    Clicky, Linear

  • Mount style

    Gasket Mount, PCB Mount

    Bottom Mount

  • Knob

    Yes

    No

KeebFinder scores

How we score
  • Keychron Q2
  • Redragon CASTOR K631 Pro SE
Performance
65
70
Build quality
90
51
Productivity
95
49
Customizability
98
56
Portability
70
83

What they share

  • Layout size: 65%
  • Hot-swappable
See every spec side by side

Full specs

Keychron Q2 vs Redragon CASTOR K631 Pro SE specs

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

18 of 27 specs differ

Keychron Q2

Redragon CASTOR K631 Pro SE

Typing & switches

Switch options

Clicky, Linear, Tactile
Clicky, Linear

Hot-swappable

Yes
Yes

Mount style

Gasket Mount, PCB Mount
Bottom Mount

Sound dampening

Yes
No

Screw-in stabilizers

Yes
No

Layout

Layout size

65%
65%

Layout standard

ANSI, ISO, ISO-DE, ISO-ES, ISO-FR, ISO-Nordic, ISO-SW, ISO-UK, JIS
ANSI

Ergonomics

Standard
Standard

Knob

Yes
No

Display

None
None

Media keys

Yes
No

Connectivity & battery

Connection

Wired
Bluetooth, 2.4 GHz, Wired

Max polling rate

1,000 Hz
—

Battery

Wired only
1,600 mAh

USB-C

Yes
Yes

Build & materials

Case material

Aluminum
Plastic

Plate material

Steel
—

Keycaps

ABS, PBT
ABS

Weight

1,645 g
470 g

Dimensions

20 x 121 x 328 mm
40 x 309 x 104 mm

Typing angle

7°
—

Backlight

RGB, south-facing
RGB

Firmware & software

QMK

Yes
No

VIA

Yes
No

N-key rollover

No
Yes

Mac & Windows

Yes
No

Extras

Released

2021
2023

For EU buyers

ISO layouts by store

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

Keychron Q2

  • Input Gear

    ISO-FR

    In stockShips to you

  • Keychron

    ISO-DE, ISO-UK, ISO-Nordic, ISO-FR, ISO-ES, ISO-SW

    In stockShips to you

  • Keychron (DE)

    ISO-DE, ISO-UK, ISO-Nordic, ISO-FR, ISO-ES, ISO-SW

    In stockDoes not ship to you

Redragon CASTOR K631 Pro SE

No ISO layout at the stores we track.

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.

Keychron Q25 stores
Redragon CASTOR K631 Pro SE2 stores

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