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Compare Nuphy Air75 V2 vs Keychron S1 Differences Side by Side

This comparison is for buyers deciding between two popular 75% low-profile mechanical keyboards with QMK/VIA support. The choice is difficult because both offer hot-swappable switches, PBT keycaps, and a 1000Hz polling rate, but diverge sharply on core design philosophy. The Nuphy Air75 V2 is a lightweight, tri-mode wireless keyboard, while the Keychron S1 is a heavier, wired-only board with a full CNC aluminum body. Your priority in connectivity and build materials will determine the winner.

-10% off
92
NuPhy Air75 V2 - Lunar Gray
85
Keychron S1 QMK Custom Mechanical Keyboard

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0.0 (0)
4.8 (18)
  • Released in 2023
  • Has Low-Profile Mechanical, Linear, Tactile switch options
  • Offers Low Profile ergonomics
  • Has built-in sound dampening
  • Supports Bluetooth, 2.4 GHz, Wired, Wireless connectivity
  • Equipped with a 4000 mAh battery
  • Weighs about 598 g
  • Sized at 14 x 317 x 133 mm
  • Made with a Aluminum, Plastic, ABS case
  • Offers Yes, Rgb, South-face, Rgb South-face RGB lighting
  • Released in 2022
  • Has Linear, Tactile, Clicky switch options
  • Offers Normal ergonomics
  • Uses a Tray Mount mounting style
  • Supports Wired, Wired only connectivity
  • Weighs about 960 g
  • Sized at 8 x 118 x 310 mm
  • Made with a Aluminum case
  • Offers Yes, Rgb, North-face, Rgb North-face RGB lighting
Scores
  • Performance: 80.8
  • Build Quality: 79.7
  • Productivity: 88.6
  • Customizability: 95.2
  • Portability: 79.2
Scores
  • Performance: 81.5
  • Build Quality: 81.6
  • Productivity: 80.1
  • Customizability: 89.6
  • Portability: 62.8
Name
Nuphy Air75 V2
Name
Keychron S1
Release year
2023
Release year
2022
Switch Options
Low-Profile Mechanical, Linear, Tactile
Switch Options
Linear, Tactile, Clicky
Profile
Low Profile
Profile
Low Profile
Hot Swappable
 
Hot Swappable
 
Layout Size
75%
Layout Size
75%
Layout Standard
ANSI
Layout Standard
ANSI
Layout Ergonomics
Low Profile
Layout Ergonomics
Normal
Knob Support
 
Knob Support
 
Display Support
 
Display Support
 
Mac/Win Support
 
Mac/Win Support
 
Multi-Media Keys
 
Multi-Media Keys
 
USB-C
 
USB-C
 
USB passthrough
 
USB passthrough
 
Connection
Bluetooth, 2.4 GHz, Wired, Wireless
Connection
Wired, Wired only
Polling Rate
1000 Hz
Polling Rate
1000 Hz
Battery capacity
4000 mAh
Battery capacity
-
Hall Effect Support
 
Hall Effect Support
 
QMK Support
 
QMK Support
 
VIA Support
 
VIA Support
 
VIAL Support
 
VIAL Support
 
N-Key Rollover
 
N-Key Rollover
 
Rapid Trigger
 
Rapid Trigger
 
Mount Style
-
Mount Style
Tray Mount
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
Rgb, South-face
Backlight
 
Rgb, North-face
Case Colors
Case Colors
Case Material
Aluminum, Plastic, ABS
Case Material
Aluminum
Keycaps Material
PBT
Keycaps Material
PBT
Dimensions
14 x 317 x 133 mm
Dimensions
8 x 118 x 310 mm
Weight
598g
Weight
960g
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Pros and Trade-offs

Your need for wireless freedom is the primary decider. If you work across multiple devices, value a clean desk, or plan to move the keyboard often, the Nuphy Air75 V2 is the clear choice. If you work at a single desk, prefer the heft and feel of an all-metal chassis, and want to save money, the wired Keychron S1 delivers excellent core functionality. Both are competent low-profile boards with strong customization support.

Nuphy Air75 V2

  • +Tri-mode wireless connectivity (Bluetooth 5.1, 2.4GHz, wired) for flexibility.
  • +Large 4000mAh battery with long estimated battery life.
  • +Includes sound-dampening features like plate poron, IXPE foam, and spacebar silicone.
  • +Lightweight build at 598 grams for easier portability.
  • +Comes with extra switches and keycaps in the box.
  • −Case uses a combination of aluminum and ABS plastic, not full metal.
  • −Relies on battery life, requiring periodic charging.
  • −Generally carries a higher price point than the S1.

Keychron S1

  • +Full CNC machined aluminum body and steel plate for a solid, premium feel.
  • +Typically available at a more affordable price.
  • +Explicitly designed for easy assembly and customization per the vendor.
  • +Wired-only connection guarantees consistent latency with no battery management.
  • −Wired-only connectivity limits placement and device switching.
  • −Heavy weight of 960 grams makes it less portable.
  • −North-facing RGB LEDs may not shine through the included non-shine-through keycaps effectively.

Which Keyboard Is Better for Your Needs?

The Nuphy Air75 V2 wins for mobile and multi-device scenarios like office work, travel, and content creation due to its wireless features and lighter weight. The Keychron S1 is the stronger choice for modders who value its all-metal construction and explicit design for customization. For stationary, single-PC use cases like gaming and programming, both keyboards are equally capable, making the decision one of wireless preference versus material preference.

GamingTie
  • •Both keyboards offer a 1000Hz polling rate for low latency.
  • •Both support N-key rollover for simultaneous key presses.
  • •The Air75 V2's wireless 2.4GHz mode offers cable-free convenience, while the S1's wired connection guarantees no potential for wireless interference.
OfficeNuphy Air75 V2
  • •The Air75 V2's tri-mode connectivity (Bluetooth, 2.4GHz, wired) allows easy switching between multiple devices like a laptop, desktop, or tablet.
  • •Its 4000mAh battery and up to 220-hour battery life (with lights off per lab tests) reduce charging frequency.
  • •At 598g, it is significantly lighter than the 960g S1, making it easier to reposition on a desk.
ProgrammingTie
  • •Both keyboards have a 75% layout with arrow keys and function row, saving desk space.
  • •Full QMK and VIA support on both allows for deep key remapping and macro creation.
  • •Both include Mac and Windows keycaps and system support for cross-platform compatibility.
TravelNuphy Air75 V2
  • •The Air75 V2 is over 350 grams lighter (598g vs 960g).
  • •Its wireless functionality eliminates the need to carry or manage a cable during use.
  • •The vendor description mentions optional accessories like the NuPack carrying case and NuFolio V3 for laptop compatibility.
ModdingKeychron S1
  • •The Keychron S1 is noted for its full CNC machined aluminum body and steel plate, offering a very solid foundation.
  • •Its vendor page explicitly states it is designed to be easy to assemble and customize, with every part being adjustable.
  • •It is compatible with low-profile, XDA, and DSA keycaps according to the manufacturer.
Content CreationNuphy Air75 V2
  • •Wireless operation provides a cleaner desk setup for filming or photography.
  • •The side RGB light bars on the Air75 V2, as described by Nuphy, can serve as aesthetic lighting.
  • •Easy device switching via Bluetooth or 2.4GHz can streamline workflows across a computer and tablet for asset management.

Frequently Asked Questions (FAQ)

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