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Head to head · Prices checked Nov 12, 2026

ACGAM S99 vs Yunzii B98 PRO

Get the Yunzii B98 PRO for the 8,000 mAh battery and knob.

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Quick verdict

Which one should you get?

Get the

ACGAM S99

Build quality in the top 50% of 96% boards under $150.

Rules this board out

  • No ISO layout. ISO-DE, UK, and other ISO variants are not offered.
$109 at WhatGeek

Get the

Yunzii B98 PRO

Battery

Build quality in the top 15% of 96% boards under $100.

Rules this board out

  • South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
$94 at Yunzii

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.

ACGAM S99

Yunzii B98 PRO

  • Battery

    6,000 mAh

    8,000 mAh

    A larger battery means fewer cables during the day

  • Case material

    Aluminum

    Metal, Plastic

  • Knob

    No

    Yes

  • Display

    None

    OLED, LED

    A case display rather than a typing feature

  • Weight

    1,200 g

    1,188 g

    Heavier boards stay planted and lighter ones travel

KeebFinder scores

How we score
  • ACGAM S99
  • Yunzii B98 PRO
Performance
66
83
Build quality
69
81
Productivity
80
93
Customizability
65
94
Portability
68
62

What they share

  • Layout size: 96%
  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Max polling rate: 1,000 Hz
  • Switch options: Linear
  • Mount style: Gasket Mount
See every spec side by side

Full specs

ACGAM S99 vs Yunzii B98 PRO specs

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

13 of 25 specs differ

ACGAM S99

Yunzii B98 PRO

Typing & switches

Switch options

Linear
Linear

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Gasket Mount

Sound dampening

Yes
Yes

Layout

Layout size

96%
96%

Layout standard

ANSI
ANSI, ISO, ISO-DE, ISO-FR

Ergonomics

Standard
Standard

Knob

No
Yes

Display

None
OLED, LED

Media keys

No
Yes

Connectivity & battery

Connection

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

Max polling rate

1,000 Hz
1,000 Hz

Battery

6,000 mAh
8,000 mAhBetter

USB-C

Yes
Yes

Build & materials

Case material

Aluminum
Metal, Plastic

Plate material

—
Aluminum

Keycaps

PBT
PBT

Weight

1,200 g
1,188 g

Dimensions

46 x 143 x 386 mm
49 x 414 x 142 mm

Backlight

RGB
RGB, south-facing

Firmware & software

QMK

No
Yes

VIA

No
Yes

N-key rollover

No
Yes

Mac & Windows

Yes
Yes

Extras

Released

2024
2026

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.

ACGAM S992 stores
Yunzii B98 PRO2 stores

For EU buyers

ISO layouts by store

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

ACGAM S99

No ISO layout at the stores we track.

Yunzii B98 PRO

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