Not sure which keyboard to choose? Try the Keyboard Finder now!

Head to head · Prices checked Nov 12, 2026

Coolkiller CK75 SE vs Yunzii B75 Pro

Get the Yunzii B75 Pro for the 4,000 Hz polling rate and knob.

KeebFinder may earn a commission when you buy through these links, at no extra cost to you.

Quick verdict

Which one should you get?

Get the

Coolkiller CK75 SE

Build quality in the top 50% of 75% boards under $100.

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.

Get the

Yunzii B75 Pro

polling rate

Build quality in the top 35% of 75% boards under $100.

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.

Coolkiller CK75 SE

Yunzii B75 Pro

  • Max polling rate

    1,000 Hz

    4,000 Hz

    Higher polling helps competitive FPS and does nothing for typing

  • Knob

    No

    Yes

  • Display

    LED

    None

    A case display rather than a typing feature

  • Weight

    1,000 g

    937 g

    Heavier boards stay planted and lighter ones travel

  • Layout standard

    ANSI

    ANSI, Dvorak, ISO

    ISO and JIS exist so regional layouts fit

KeebFinder scores

How we score
  • Coolkiller CK75 SE
  • Yunzii B75 Pro
Performance
75
85
Build quality
66
72
Productivity
77
91
Customizability
67
78
Portability
80
80

What they share

  • Layout size: 75%
  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Battery: 4,000 mAh
  • Case material: Plastic
  • Mount style: Gasket Mount
See every spec side by side

Full specs

Coolkiller CK75 SE vs Yunzii B75 Pro specs

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

10 of 24 specs differ

Coolkiller CK75 SE

Yunzii B75 Pro

Typing & switches

Switch options

—
Clicky, Linear, Tactile

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Gasket Mount

Sound dampening

Yes
Yes

Screw-in stabilizers

No
Yes

Layout

Layout size

75%
75%

Layout standard

ANSI
ANSI, Dvorak, ISO

Ergonomics

Standard
Standard

Knob

No
Yes

Display

LED
None

Media keys

No
Yes

Connectivity & battery

Connection

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

Max polling rate

1,000 Hz
4,000 HzBetter

Battery

4,000 mAh
4,000 mAh

USB-C

Yes
Yes

Build & materials

Case material

Plastic
Plastic

Plate material

Polycarbonate
Aluminum

Keycaps

PBT, PC
PBT, PC

Weight

1,000 g
937 g

Dimensions

40 x 326 x 139 mm
42 x 334 x 144 mm

Backlight

RGB, south-facing
RGB, south-facing

Firmware & software

N-key rollover

Yes
Yes

Mac & Windows

Yes
Yes

Extras

Released

2026
2024

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.

For EU buyers

ISO layouts by store

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

Coolkiller CK75 SE

No ISO layout at the stores we track.

Yunzii B75 Pro

Still torn?

Answer a few quick questions and the keyboard finder ranks 2,000+ boards by how you will actually use yours.