Head to head · Prices checked Nov 11, 2026

Azio Cascade Slim vs Keychron B4 Pro

Get the Azio Cascade Slim for hot-swappable and the 4,000 mAh battery.

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Hot-swappable

from$79at Azio

from$39at Keychron

Quick verdict

Which one should you get?

Get the

Azio Cascade Slim

Hot-swappable

Build quality in the top 30% of 75% boards under $100.

Rules this board out

Low-profile switches and keycaps only. Standard MX keycaps will not fit.
No numpad.

$79 at Azio

Get the

Keychron B4 Pro

Build quality in the bottom 10% of 96% boards under $100.

Rules this board out

Switches are soldered. Swapping them means soldering.
Low-profile switches and keycaps only. Standard MX keycaps will not fit.
Compact full-size layout. The numpad is present, the gaps of a full-size board are not.

$39 at Keychron

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.

Azio Cascade Slim

Keychron B4 Pro

Layout size
75%
96%
Hot-swappable
Yes
No
Switch changes without soldering
Battery
4,000 mAh
800 mAh
A larger battery means fewer cables during the day
Case material
Aluminum
ABS
Weight
1,111 g
495 g
Heavier boards stay planted and lighter ones travel

KeebFinder scores

How we score

Azio Cascade Slim
Keychron B4 Pro

Performance: 75
51
Build quality: 74
43
Productivity: 87
71
Customizability: 79
43
Portability: 80
52

What they share

Connection: Bluetooth, 2.4 GHz, Wired
Low profile
Switch options: Clicky, Linear, Tactile
Keycaps: ABS

See every spec side by side

Full specs

Azio Cascade Slim vs Keychron B4 Pro specs

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

11 of 23 specs differ

Spec

Azio Cascade Slim

Keychron B4 Pro

Typing & switches

Switch options

Clicky, Linear, Tactile

Hot-swappable

Yes

Low profile

Yes

Sound dampening

Yes

Screw-in stabilizers

Yes

Layout

Layout size

75%

96%

Layout standard

ANSI

Ergonomics

Standard

Display

None

Connectivity & battery

Connection

Bluetooth, 2.4 GHz, Wired

Max polling rate

—

1,000 Hz

Battery

4,000 mAhBetter

800 mAh

USB-C

Yes

Build & materials

Case material

Aluminum

ABS

Plate material

Aluminum

—

Keycaps

ABS

Weight

1,111 g

495 g

Dimensions

41 x 126 x 27 mm

-1 x -1 x -1 mm

Typing angle

—

3°

Backlight

RGB

None

Firmware & software

N-key rollover

Yes

Mac & Windows

Yes

Extras

Released

2022

2025

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.

Azio Cascade Slim2 stores