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Head to head · Prices checked Nov 11, 2026

GravaStar Mercury K1 vs Yunzii B75 Pro Max

Get the Yunzii B75 Pro Max for knob and qmk.

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Quick verdict

Which one should you get?

Get the

GravaStar Mercury K1

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

Get the

Yunzii B75 Pro Max

Knob

Build quality in the top 15% 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.

GravaStar Mercury K1

Yunzii B75 Pro Max

  • Knob

    No

    Yes

  • Display

    None

    TFT

    A case display rather than a typing feature

  • Weight

    1,080 g

    993 g

    Heavier boards stay planted and lighter ones travel

  • QMK

    No

    Yes

    The deep option when you want to remap every key

  • VIA

    No

    Yes

    GUI remapping without compiling firmware

KeebFinder scores

How we score
  • GravaStar Mercury K1
  • Yunzii B75 Pro Max
Performance
65
83
Build quality
67
80
Productivity
67
73
Customizability
63
88
Portability
92
90

What they share

  • Layout size: 75%
  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Battery: 8,000 mAh
  • Switch options: Linear
  • Mount style: Gasket Mount
See every spec side by side

Full specs

GravaStar Mercury K1 vs Yunzii B75 Pro Max specs

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

10 of 22 specs differ

GravaStar Mercury K1

Yunzii B75 Pro Max

Typing & switches

Switch options

Linear
Linear

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Gasket Mount

Layout

Layout size

75%
75%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Knob

No
Yes

Display

None
TFT

Connectivity & battery

Connection

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

Battery

8,000 mAh
8,000 mAh

USB-C

Yes
Yes

Build & materials

Case material

Aluminum
—

Plate material

POM
—

Keycaps

—
PBT

Weight

1,080 g
993 g

Dimensions

46 x 343 x 156 mm
42 x 334 x 144 mm

Backlight

RGB
RGB, south-facing

Firmware & software

QMK

No
Yes

VIA

No
Yes

N-key rollover

No
Yes

Mac & Windows

Yes
No

Extras

Released

2024
2025

Where to buy

Compare prices

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

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