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Compare Redragon CASTOR K631 Pro vs FIZZ K617 Differences Side by Side

This comparison is for buyers deciding between two compact, budget-friendly Redragon keyboards. The choice hinges on whether you value wireless connectivity and dedicated arrow keys or prefer the smallest possible footprint at a potentially lower cost. Both are hot-swappable and offer RGB, making the decision less about core features and more about layout and connection type.

CASTOR K631 PRO Full-Transparent Mechanical Keyboard
FIZZ K617 60% Wired Mechanical Keyboard (Red Inner)

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  • Released in 2022
  • Has Linear switch options
  • Available in a 65% layout
  • Supports Bluetooth, 2.4 GHz, Wired, Wireless connectivity
  • Equipped with a 1600 mAh battery
  • Weighs about 470 g
  • Sized at 40 x 309 x 104 mm
  • Features ABS keycaps
  • Released in 2021
  • Has Linear, Clicky switch options
  • Available in a 60% layout
  • Supports Wired, Wired only connectivity
  • Weighs about 590 g
  • Sized at 38 x 99 x 36 mm
Scores
  • Performance: 70.5
  • Build Quality: 56.1
  • Productivity: 53.2
  • Customizability: 59.1
  • Portability: 84.9
Scores
  • Performance: 70.1
  • Build Quality: 55.3
  • Productivity: 52.4
  • Customizability: 56.5
  • Portability: 69.6
Name
Redragon CASTOR K631 Pro
Name
Redragon FIZZ K617
Release year
2022
Release year
2021
Switch Options
Linear
Switch Options
Linear, Clicky
Profile
Normal Profile
Profile
Normal Profile
Hot Swappable
 
Hot Swappable
 
Layout Size
65%
Layout Size
60%
Layout Standard
ANSI
Layout Standard
ANSI
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
Wired, Wired only
Polling Rate
-
Polling Rate
-
Battery capacity
1600 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
Bottom Mount
Mount Style
Bottom Mount
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
Rgb
Backlight
 
Rgb
Case Colors
Case Colors
Case Material
Plastic
Case Material
Plastic
Keycaps Material
ABS
Keycaps Material
-
Dimensions
40 x 309 x 104 mm
Dimensions
38 x 99 x 36 mm
Weight
470g
Weight
590g
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Pros and Trade-offs

Your primary need dictates the choice. If you want to cut the cord and value dedicated arrow keys, the Redragon CASTOR K631 Pro is the clear option. If your priority is the smallest footprint for a tight budget or travel bag, and you don't mind a cable, the Redragon FIZZ K617 is a capable, no-frills alternative. Both serve as solid entry points into hot-swappable mechanical keyboards.

Redragon CASTOR K631 Pro

  • +Tri-mode connectivity (USB-C wired, Bluetooth, 2.4GHz) for versatile use.
  • +65% layout includes dedicated arrow keys and a few extra navigation keys.
  • +Includes a 1600mAh rechargeable battery for wireless operation.
  • +Comes with a keycap & switch puller and a detachable strap for portability.
  • +Software support for creating custom lighting effects and macros.
  • −Larger and heavier than a true 60% keyboard, reducing portability.
  • −Battery-dependent for wireless modes, requiring periodic charging.
  • −ABS keycaps may develop shine over time with heavy use.

Redragon FIZZ K617

  • +More compact 60% layout maximizes desk space.
  • +Wired-only design ensures consistent latency and no battery management.
  • +Potentially more affordable, as indicated by its lower starting price range.
  • +Hot-swappable socket is compatible with both 3-pin and 5-pin switches.
  • +Vendor description highlights a 'space-saving design' and 'budget-friendly pricing'.
  • −Lacks wireless connectivity, limiting placement options.
  • −60% layout requires using function layers for arrow keys and navigation.
  • −Package does not include a switch puller, only a keyboard, cable, and manual.

Which Keyboard Is Better for Your Needs?

The CASTOR K631 Pro wins in most scenarios requiring a balance of functionality and cable-free use, such as office work, programming, and gaming. Its wireless options and 65% layout with arrow keys provide tangible benefits. The FIZZ K617 is the more focused choice for travel due to its smaller 60% size, and it can be a more affordable entry point. For modding, both are equally capable with their hot-swap sockets.

GamingRedragon CASTOR K631 Pro
  • •The CASTOR K631 Pro offers tri-mode connectivity (wired, Bluetooth, 2.4GHz) for reduced cable clutter.
  • •Its 65% layout retains dedicated arrow keys, which some gamers prefer for in-game menus or controls.
  • •The vendor description states it is 'dedicated for FPS Gamer' and includes a detachable strap for portability between setups.
OfficeRedragon CASTOR K631 Pro
  • •Wireless connectivity via Bluetooth or 2.4GHz allows for a cleaner desk and easier connection to multiple devices.
  • •The 65% layout with arrow keys can be more intuitive for spreadsheet navigation compared to a 60% layout.
  • •It includes a 1600mAh battery, eliminating the need for a constant wired connection.
ProgrammingRedragon CASTOR K631 Pro
  • •The dedicated arrow keys and additional navigation cluster on the 65% layout are beneficial for code editing.
  • •Wireless operation provides flexibility in desk setup and device pairing.
  • •Both keyboards support software for macros, but the CASTOR's layout may require fewer layer taps for common actions.
TravelRedragon FIZZ K617
  • •The FIZZ K617 has a smaller 60% footprint (38 x 99 x 36 mm) and is lighter (590g vs 470g for the CASTOR).
  • •Its wired-only design means one less component (a wireless dongle) to carry and no battery to manage.
  • •The vendor lists it as having a 'space-saving design' and 'budget-friendly pricing', which aligns with a portable secondary keyboard.
ModdingTie
  • •Both keyboards feature hot-swappable sockets compatible with 3-pin and 5-pin switches.
  • •Both support proprietary software for customizing lighting and macros.
  • •Both use a plastic case and bottom mount style, offering similar foundational modding platforms.
Content CreationRedragon CASTOR K631 Pro
  • •Wireless connectivity allows for easier repositioning during filming or photography setups.
  • •The 65% layout's arrow keys are useful for timeline scrubbing in video or audio editing software.
  • •The included software for macro customization can streamline repetitive editing shortcuts.

Frequently Asked Questions (FAQ)

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