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Head to head · Prices checked Nov 11, 2026

Redragon CASTOR K631 vs Ducky OK M 65

Get the Ducky OK M 65 for knob and via.

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Quick verdict

Which one should you get?

Get the

Redragon CASTOR K631

Build quality in the bottom 35% of 65% boards under $50.

Get the

Ducky OK M 65

Knob

Build quality in the top 35% of 65% boards under $100.

Rules this board out

  • North-facing LEDs. Cherry-profile keycaps can hit the switch housing.

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.

Redragon CASTOR K631

Ducky OK M 65

  • Connection

    Wired

    Bluetooth, 2.4 GHz, Wired

    Wireless for several devices and wired for lower latency

  • Switch options

    Linear

    Clicky, Linear

  • Mount style

    Bottom Mount

    Gasket Mount

  • Knob

    No

    Yes

  • VIA

    No

    Yes

    GUI remapping without compiling firmware

KeebFinder scores

How we score
  • Redragon CASTOR K631
  • Ducky OK M 65
Performance
71
61
Build quality
57
72
Productivity
55
83
Customizability
61
78
Portability
72
85

What they share

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

Full specs

Redragon CASTOR K631 vs Ducky OK M 65 specs

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

11 of 20 specs differ

Redragon CASTOR K631

Ducky OK M 65

Typing & switches

Switch options

Linear
Clicky, Linear

Hot-swappable

Yes
Yes

Mount style

Bottom Mount
Gasket Mount

Sound dampening

No
Yes

Layout

Layout size

65%
65%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Knob

No
Yes

Display

None
None

Connectivity & battery

Connection

Wired
Bluetooth, 2.4 GHz, Wired

USB-C

Yes
Yes

Build & materials

Case material

Plastic
—

Plate material

—
Polycarbonate

Keycaps

ABS
PBT

Weight

430 g
—

Backlight

RGB
RGB, north-facing

Firmware & software

VIA

No
Yes

N-key rollover

Yes
No

Mac & Windows

No
Yes

Extras

Released

2023
2026

Where to buy

Compare prices

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

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Lowest price across stores, Amazon excluded.

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