GravaStar Mercury K1 vs WOBKEY Rainy75 ProPortability vs Features
Choose the GravaStar Mercury K1 for its lighter weight and larger battery, or the WOBKEY Rainy75 Pro for its extensive modding features and firmware support.
Which one should you get?
Get the
GravaStar Mercury K1
Portability
- Lighter weight of 1080g for better portability.
- Larger 8000mAh battery capacity for extended wireless use.
- Aluminum alloy case with a distinctive, streamlined aesthetic according to its vendor page.
- Lacks explicitly stated support for VIA, QMK, or detailed programmability features.
- Switch type is pre-selected as Linear (Kailh), with no mention of other included options.
- Does not list specific sound-dampening materials or PBT keycaps in its core specifications.
Get the
WOBKEY Rainy75 Pro
Features
- Explicit support for VIA and QMK firmware for extensive customization.
- Includes multiple sound-dampening layers: poron, EPMD, and PET insulation sheet.
- Comes with double-shot PBT keycaps and screw-in stabilizers.
- Heavier at 1800g, which reduces portability.
- Smaller 7000mAh battery compared to the Mercury K1.
- The steel external weight, while premium, contributes significantly to its mass.
Your priority should guide this choice. For a keyboard you'll move frequently or use wirelessly for long stretches, the GravaStar Mercury K1's lighter build and larger battery are compelling. If you value deep customization, a premium typing feel, and advanced software features right out of the box, the WOBKEY Rainy75 Pro's extensive spec sheet makes it the more versatile and future-proof investment.
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.
GravaStar Mercury K1
WOBKEY Rainy75 Pro
Battery
8,000 mAh
7,000 mAh
Case material
Aluminum
Aluminum, Steel
Switch options
Linear
Linear, Silent
Weight
1,080 g
1,800 g
QMK
No
Yes
- GravaStar Mercury K1
- WOBKEY Rainy75 Pro
- Performance
- 6680
- Build quality
- 6788
- Productivity
- 6794
- Customizability
- 6489
- Portability
- 9292
- Layout size: 75%
- Connection: Bluetooth, 2.4 GHz, Wired
- Hot-swappable
- Mount style: Gasket Mount
What will you mostly use it for?
The WOBKEY Rainy75 Pro is the more capable all-rounder, winning in gaming, programming, modding, and content creation due to its specified polling rate, extensive firmware support, and sound-optimized construction. The GravaStar Mercury K1 claims a clear advantage only for travel, thanks to its substantially lower weight and larger battery. For office use, both keyboards are equally competent with their wireless options and system compatibility.
Pick the WOBKEY Rainy75 Pro
- The Rainy75 Pro lists a 1000 Hz polling rate, which the Mercury K1's specifications do not mention.
- It features N-Key Rollover, ensuring all pressed keys are registered simultaneously.
- South-facing RGB LEDs, as listed, prevent interference with Cherry-profile keycaps.
GravaStar Mercury K1 vs WOBKEY Rainy75 Pro specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
14 of 25 specs differ
GravaStar Mercury K1
WOBKEY Rainy75 Pro
Switch options
Hot-swappable
Mount style
Sound dampening
Screw-in stabilizers
Layout size
Layout standard
Ergonomics
Display
Connection
Max polling rate
Battery
USB-C
Case material
Plate material
Keycaps
Weight
Dimensions
Typing angle
Backlight
QMK
VIA
N-key rollover
Mac & Windows
Released
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GravaStar Mercury K1 vs WOBKEY Rainy75 Pro: your questions
The WOBKEY Rainy75 Pro has superior software support, as it is explicitly listed with VIA and QMK compatibility. These are open-source tools that allow for deep key remapping, macro creation, and layer programming. The GravaStar Mercury K1's vendor description mentions a driver but does not specify VIA or QMK support.
The GravaStar Mercury K1 is a capable gaming keyboard with hot-swap sockets and a gasket mount. However, the WOBKEY Rainy75 Pro lists specific gaming-oriented features like a 1000 Hz polling rate and N-Key Rollover, which are not mentioned in the Mercury K1's provided specifications, giving the Rainy75 Pro a potential edge for competitive play.
The GravaStar Mercury K1 is more portable. It weighs 720 grams less than the WOBKEY Rainy75 Pro (1080g vs 1800g) and has a larger 8000mAh battery, which should last longer on a single charge. Both are 75% layout keyboards with similar wireless connectivity options.
Yes, both the GravaStar Mercury K1 and the WOBKEY Rainy75 Pro feature hot-swappable sockets. The Mercury K1's vendor page specifies that its sockets support both 3-pin and 5-pin switches. The Rainy75 Pro's hot-swap capability is listed among its extra features.
The WOBKEY Rainy75 Pro comes equipped with double-shot PBT keycaps, according to its vendor description. PBT plastic is known for being more durable and resistant to shine compared to ABS. The GravaStar Mercury K1's keycap material is not specified in the provided data.
The WOBKEY Rainy75 Pro has more detailed sound-dampening features. Its listing mentions several layers of sound absorption, including poron, EPMD, and a PET insulation sheet. The GravaStar Mercury K1's vendor description mentions a flexible plate to reduce noise but does not list specific damping materials.
Yes, the WOBKEY Rainy75 Pro is listed with Mac and Windows support. Its programmability via VIA and QMK also works across operating systems, allowing for customization on macOS.
Both keyboards use aluminum for their primary case construction. The GravaStar Mercury K1 has an aluminum alloy exoskeleton. The WOBKEY Rainy75 Pro uses a CNC aluminum case and also includes a silver steel external weight.
Yes, the GravaStar Mercury K1 supports Bluetooth connectivity, along with 2.4 GHz wireless and a wired USB-C connection. This tri-mode connectivity is also a feature of the WOBKEY Rainy75 Pro.
The plates differ between the two keyboards. The GravaStar Mercury K1 uses a POM plate, while the WOBKEY Rainy75 Pro uses an FR4 plate with flex cuts. The plate material influences the typing sound and feel.
Only the WOBKEY Rainy75 Pro is explicitly listed with south-facing RGB LEDs. South-facing LEDs prevent interference with Cherry-profile keycaps. The GravaStar Mercury K1 has RGB lighting, but its switch/LED orientation is not specified.
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