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Head to head · Prices checked Nov 13, 2026

Fantech MAXFIT81 MK910 vs Yunzii RX S75

Get the Fantech MAXFIT81 MK910 for knob. Get the Yunzii RX S75 for the 5,000 mAh battery.

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Quick verdict

Which one should you get?

Get the

Fantech MAXFIT81 MK910

Knob

Build quality in the top 50% of 75% boards under $150.

Rules this board out

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

Get the

Yunzii RX S75

Battery

Build quality in the bottom 20% of 75% boards under $150.

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.

Fantech MAXFIT81 MK910

Yunzii RX S75

  • Connection

    Bluetooth, Wired, 2.4 GHz

    Wired, Wireless

    Wireless for several devices and wired for lower latency

  • Battery

    4,000 mAh

    5,000 mAh

    A larger battery means fewer cables during the day

  • Case material

    ABS, Aluminum

    Acrylic

  • Switch options

    Clicky, Linear, Tactile

    Clicky

  • Knob

    Yes

    No

KeebFinder scores

How we score
  • Fantech MAXFIT81 MK910
  • Yunzii RX S75
Performance
63
65
Build quality
67
49
Productivity
83
57
Customizability
82
64
Portability
81
79

What they share

  • Layout size: 75%
  • Hot-swappable
See every spec side by side

Full specs

Fantech MAXFIT81 MK910 vs Yunzii RX S75 specs

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

11 of 21 specs differ

Fantech MAXFIT81 MK910

Yunzii RX S75

Typing & switches

Switch options

Clicky, Linear, Tactile
Clicky

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
—

Sound dampening

Yes
No

Layout

Layout size

75%
75%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Knob

Yes
No

Display

OLED
None

Connectivity & battery

Connection

Bluetooth, Wired, 2.4 GHz
Wired, Wireless

Battery

4,000 mAh
5,000 mAhBetter

USB-C

Yes
No

Build & materials

Case material

ABS, Aluminum
Acrylic

Plate material

FR4
—

Keycaps

ABS, PBT
—

Weight

1,093 g
—

Dimensions

45 x 303 x 104 mm
—

Backlight

RGB, south-facing
RGB

Firmware & software

N-key rollover

Yes
No

Mac & Windows

Yes
Yes

Extras

Released

2023
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.

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