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Compare GravaStar Mercury K1 vs WOBKEY Rainy75 Differences Side by Side

This comparison is for buyers deciding between two feature-rich 75% aluminum wireless keyboards. The choice is difficult because both offer triple-mode connectivity, hot-swappable sockets, and gasket mounts. The GravaStar prioritizes long battery life with a unique aesthetic, while the WOBKEY focuses on enthusiast-grade modding features and sound optimization. Your priority will determine the winner.

66
GravaStar Mercury K1 Wireless Mechanical Keyboard
93
Rainy 75 WOBKey Keyboard Kit

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0.0 (0)
5.0 (22)
  • Built with the ANSI layout standard
  • Equipped with a 8000 mAh battery
  • Weighs about 1080 g
  • Sized at 46 x 343 x 156 mm
  • Offers Yes, Rgb RGB lighting
  • Built with the ANSI, ISO-DE, ISO layout standard
  • Supports QMK firmware
  • Supports VIA configuration
  • Includes screw-in stabilizers
  • Has built-in sound dampening
  • Equipped with a 3500 mAh battery
  • Weighs about 1800 g
  • Sized at 40 x 320 x 130 mm
  • Features PBT keycaps
  • Offers Yes, Rgb, South-face, Rgb South-face RGB lighting
Scores
  • Performance: 66.2
  • Build Quality: 67.4
  • Productivity: 66.5
  • Customizability: 63.9
  • Portability: 92.3
Scores
  • Performance: 70.7
  • Build Quality: 90.1
  • Productivity: 94.1
  • Customizability: 95.1
  • Portability: 81.4
Name
GravaStar Mercury K1
Name
WOBKEY Rainy75
Release year
2024
Release year
2024
Switch Options
Linear
Switch Options
Linear
Profile
Normal Profile
Profile
Normal Profile
Hot Swappable
 
Hot Swappable
 
Layout Size
75%
Layout Size
75%
Layout Standard
ANSI
Layout Standard
ANSI, ISO-DE, ISO
Layout Ergonomics
Normal
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
Bluetooth, 2.4 GHz, Wired, Wireless
Polling Rate
-
Polling Rate
-
Battery capacity
8000 mAh
Battery capacity
3500 mAh
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
Gasket Mount
Mount Style
Gasket Mount
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
Rgb
Backlight
 
Rgb, South-face
Case Colors
Case Colors
Case Material
Aluminum
Case Material
Aluminum
Keycaps Material
-
Keycaps Material
PBT
Dimensions
46 x 343 x 156 mm
Dimensions
40 x 320 x 130 mm
Weight
1080g
Weight
1800g
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Pros and Trade-offs

Select the WOBKEY Rainy75 if your priority is a customizable, acoustically tuned typing experience with robust software support. Opt for the GravaStar Mercury K1 if you need a keyboard that can last weeks on a single charge and is easier to move around. The Rainy75 offers more for the enthusiast, while the Mercury K1 caters to convenience and endurance.

GravaStar Mercury K1

  • +Exceptionally large 8000mAh battery for extended wireless use.
  • +Lighter weight (1080g) for easier portability.
  • +Features a unique, streamlined aluminum alloy exoskeleton design according to the vendor.
  • +Hot-swappable sockets support both 3-pin and 5-pin switches.
  • −Lacks advanced firmware support like VIA or QMK mentioned in its listing.
  • −Keycap material is not specified, potentially indicating lower-quality ABS.
  • −No detailed sound dampening features are listed compared to the competitor.

WOBKEY Rainy75

  • +Extensive firmware support for VIA and QMK for easy reprogramming.
  • +Comprehensive sound dampening with poron, EPMD, PET foam, and PET insulation layers.
  • +Includes high-quality Double Shot PBT keycaps.
  • +Flex cut PCB supports multiple stabilizer types (plate and PCB mount).
  • −Smaller 3500mAh battery requires more frequent charging.
  • −Substantially heavier at 1800g, reducing portability.
  • −The vendor listing mentions Bluetooth 5.0, but this specific version is not confirmed in the core metadata.

Which Keyboard Is Better for Your Needs?

The WOBKEY Rainy75 is the clear choice for users who value deep customization, whether through firmware (VIA/QMK), sound tuning with multiple foam layers, or keycap compatibility. The GravaStar Mercury K1 wins in scenarios where portability and battery life are paramount, such as frequent travel or a cable-free office setup. For general gaming, both are equally capable.

GamingTie
  • •Both offer 2.4 GHz wireless and wired connectivity for low-latency options.
  • •Both feature linear switches suitable for gaming.
  • •Both have RGB backlighting.
OfficeGravaStar Mercury K1
  • •The GravaStar Mercury K1's 8000mAh battery requires far less frequent charging.
  • •Its lighter weight (1080g) makes it easier to reposition on a desk.
  • •Triple-mode connectivity supports easy switching between devices.
ProgrammingWOBKEY Rainy75
  • •The WOBKEY Rainy75 supports VIA and QMK for extensive key remapping and macros.
  • •It includes PBT keycaps, which are more durable against shine from heavy use.
  • •Its layout supports multiple standards (ANSI, ISO-DE, ISO).
TravelGravaStar Mercury K1
  • •The GravaStar Mercury K1 is significantly lighter at 1080g versus 1800g.
  • •Its larger 8000mAh battery extends time between charges on the go.
  • •Both share similar compact 75% footprints.
ModdingWOBKEY Rainy75
  • •The WOBKEY Rainy75 explicitly supports VIA and QMK firmware.
  • •It features multiple sound dampening layers: poron, EPMD, PET foam, and a PET insulation sheet.
  • •It includes a flex cut PCB compatible with both plate and PCB mount stabilizers and offers multiple plate material options (FR4, Polycarbonate).
Content CreationWOBKEY Rainy75
  • •The WOBKEY's VIA/QMK support allows for complex macro programming for editing software.
  • •South-facing RGB LEDs reduce interference with Cherry-profile keycaps, a common choice for custom sets.
  • •PBT keycaps offer better long-term texture for extended typing sessions.

Frequently Asked Questions (FAQ)

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