Keychron K4 Ultra vs V6 UltraCompact or Full-Size
Choose the K4 Ultra for its more compact 96% footprint, or the V6 Ultra for a full-size layout, gasket mount, and ISO variants.
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5.0 · 2 reviews
from$114at Keychron
5.0 · 6 reviews
from$119at MK
Which one should you get?
Get the
Keychron K4 Ultra
Build quality in the bottom 40% of 96% boards under $150.
- 96% ANSI layout keeps the numpad while reducing the gaps of a full-size board.
- Tri-mode connectivity includes Bluetooth, 2.4 GHz, and wired operation.
- Steel plate, ABS case, and PBT keycaps.
- 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.
- Compact full-size layout. The numpad is present, the gaps of a full-size board are not.
Get the
Keychron V6 Ultra
Knob
Build quality in the top 15% of 100% boards under $150.
- 100% layout is offered in ANSI and multiple ISO variants, including ISO-DE and ISO-UK.
- Gasket mount and polycarbonate plate, which Keychron describes as providing a softer, quieter typing experience.
- Knob support and hot-swappable switches.
- South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
Choose the Keychron K4 Ultra if reducing the keyboard's footprint matters more than having standard full-size spacing. Choose the V6 Ultra if you want ISO layout choices, a knob, or the gasket-mounted polycarbonate-plate design. Both offer 8000 Hz polling, tri-mode connectivity, and hot-swappable switches, so the layout and construction are the deciding differences.
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.
Keychron K4 Ultra
Keychron V6 Ultra
Layout size
96%
100%
Connection
Bluetooth, 2.4 GHz, Wired
Wired, Bluetooth, 2.4 GHz
Wireless for several devices and wired for lower latency
Case material
ABS
ABS, Aluminum, Metal, Plastic
Mount style
Plate Mount
Gasket Mount
Knob
No
Yes
- Keychron K4 Ultra
- Keychron V6 Ultra
- Performance
- 8889
- Build quality
- 6377
- Productivity
- 8791
- Customizability
- 7579
- Portability
- 5756
- Hot-swappable
- Battery: 4,000 mAh
- Max polling rate: 8,000 Hz
- Switch options: Clicky, Linear, Tactile
- Sound dampening
- Keycaps: PBT
What will you mostly use it for?
The K4 Ultra is the more space-efficient choice, although it is slightly heavier than the V6 Ultra. The V6 Ultra has the edge for users who want a full-size layout, ISO availability, knob support, or a gasket-mounted design. Gaming is a close call because both list the same polling rate and connection modes. Both are well equipped for switch changes and everyday customization.
It's a tie
- Both list an 8000 Hz polling rate and support wired and 2.4 GHz connections.
- Both have hot-swappable switches and N-key rollover.
- The K4 Ultra's 96% layout is more compact, while the V6 Ultra has a full-size layout and knob support.
What owners say
Ratings and quotes collected from verified store reviews, including the critical ones.
Keychron K4 Ultra
2 owner reviews
“Quality keyboard. I just wish the indicator lights for caps lock and num lock was brighter. Even tried increasing it on the software but it isn't enough.”
Keychron V6 Ultra
6 owner reviews
“This thing is great the backlight is exactly how I want it and I don't got to download an app to change the light the keys are really responsive”
Keychron K4 Ultra vs V6 Ultra specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
9 of 25 specs differ
Keychron K4 Ultra
Keychron V6 Ultra
Switch options
Hot-swappable
Mount style
Sound dampening
Screw-in stabilizers
Layout size
Layout standard
Ergonomics
Knob
Display
Media keys
Connection
Max polling rate
Battery
USB-C
Case material
Plate material
Keycaps
Weight
Dimensions
Typing angle
Backlight
N-key rollover
Mac & Windows
Released
ISO layouts by store
Which stores sell ISO-DE, UK, and the other regional layouts.
Keychron K4 Ultra
No ISO layout at the stores we track.
Keychron V6 Ultra
Input Gear
ISO-DE
Out of stockShips to you
Keychron (DE)
ISO-DE, ISO-FR, ISO-ES
In stockDoes not ship to you
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.
Keychron K4 Ultra vs V6 Ultra: your questions
The K4 Ultra uses a compact 96% ANSI layout, while the V6 Ultra is a 100% board with ANSI and several ISO options. The V6 Ultra also has a gasket mount, polycarbonate plate, and knob support.
Yes. The K4 Ultra is listed at 391 x 140 mm, while the V6 Ultra measures 448 x 149 mm. The K4 Ultra keeps a numpad but reduces the spacing found on a full-size layout.
The V6 Ultra is listed at 1130 g, compared with 1241 g for the K4 Ultra. Despite its smaller dimensions, the K4 Ultra is heavier according to the listed weights.
Both keyboards support Bluetooth and 2.4 GHz wireless, as well as wired USB-C connectivity. Both list an 8000 Hz polling rate, with the vendor descriptions specifying that rate for wired and 2.4 GHz modes.
Keychron lists up to 600 hours for the K4 Ultra and up to 660 hours for the V6 Ultra, with the backlight off. The V6 Ultra listing also gives up to 200 hours with RGB at its lowest brightness.
Yes, both are listed as hot-swappable. Keychron says the V6 Ultra supports almost all 3-pin and 5-pin MX-style mechanical switches, while the K4 Ultra vendor description also confirms switch replacement without soldering.
Yes. Its listed options include ISO, ISO-DE, ISO-ES, ISO-FR, and ISO-UK, as well as ANSI and JIS. The K4 Ultra is listed as ANSI only.
The V6 Ultra supports a knob and is sold in a fully assembled knob version. Knob support is not listed for the K4 Ultra, which lists multi-media keys.
The V6 Ultra pairs its gasket mount with a polycarbonate plate; Keychron describes the design as reducing resonance for a softer, quieter typing experience. The K4 Ultra uses a plate mount and steel plate.
Both vendor descriptions list support for macOS, Windows, and Linux. Each also includes Mac and Windows keycaps, according to the product listings.
Both use south-facing RGB LEDs, and their compatibility notes caution that shine-through legends stay dark. The same notes say some sculpted keycaps may clip the LEDs.
The K4 Ultra is the more space-efficient option, measuring 391 x 140 mm and using a 96% layout. The V6 Ultra is wider at 448 mm and uses a full-size layout.
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