Compare Redragon CASTOR K631 HE vs DHARMA K556 HE Differences Side by Side

This comparison is for buyers deciding between Redragon's two wired Hall Effect keyboards. The choice hinges on a fundamental trade-off: the CASTOR K631 HE offers a compact 65% form factor at a lower cost, while the DHARMA K556 HE provides a full-size layout with an aluminum case and PBT keycaps for a higher price. Both share core gaming features like 8000Hz polling, Hall Effect switches, and rapid trigger, making the decision about layout, build materials, and budget.

Model
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Rating	0.0 stars (0 reviews)	0.0 stars (0 reviews)
Purchase Options
Main differences	Released in 2026 Available in a 65% layout Weighs about 638 g Sized at 33 x 323 x 107 mm Made with a Plastic case	Released in 2025 Available in a 100% layout Has built-in sound dampening Uses a Bottom Mount mounting style Weighs about 1130 g Made with a Aluminum case Features PBT keycaps
Score	Scores Performance: 91.4 Build Quality: 42.3 Productivity: 47.1 Customizability: 45.7 Portability: 65.2	Scores Performance: 93.3 Build Quality: 57.5 Productivity: 56.4 Customizability: 44.7 Portability: 41.7
Name	Name Redragon CASTOR K631 HE	Name Redragon DHARMA K556 HE
Release year	Release year 2026	Release year 2025
Switch Options	Switch Options Magnetic	Switch Options Magnetic
Profile	Profile Normal Profile	Profile Normal Profile
Hot Swappable	Hot Swappable	Hot Swappable
Layout Size	Layout Size 65%	Layout Size 100%
Layout Standard	Layout Standard ANSI	Layout Standard ANSI
Layout Ergonomics	Layout Ergonomics Normal	Layout Ergonomics Normal
Knob Support	Knob Support	Knob Support
Display Support	Display Support	Display Support
Mac/Win Support	Mac/Win Support	Mac/Win Support
Multi-Media Keys	Multi-Media Keys	Multi-Media Keys
USB-C	USB-C	USB-C
USB passthrough	USB passthrough	USB passthrough
Connection	Connection Wired, Wired only	Connection Wired, Wired only
Polling Rate	Polling Rate 8000 Hz	Polling Rate 8000 Hz
Battery capacity	Battery capacity -	Battery capacity -
Hall Effect Support	Hall Effect Support	Hall Effect Support
QMK Support	QMK Support	QMK Support
VIA Support	VIA Support	VIA Support
VIAL Support	VIAL Support	VIAL Support
N-Key Rollover	N-Key Rollover	N-Key Rollover
Rapid Trigger	Rapid Trigger	Rapid Trigger
Mount Style	Mount Style -	Mount Style Bottom Mount
Screw in Stabilizers	Screw in Stabilizers	Screw in Stabilizers
Sound Dampening	Sound Dampening	Sound Dampening
Backlight	Backlight Rgb	Backlight Rgb
Case Colors	Case Colors	Case Colors
Case Material	Case Material Plastic	Case Material Aluminum
Keycaps Material	Keycaps Material -	Keycaps Material PBT
Dimensions	Dimensions 33 x 323 x 107 mm	Dimensions -
Weight	Weight 638g	Weight 1130g

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Pros and Trade-offs

Your primary need dictates the choice. If you require a number pad for work, value a solid aluminum build, and have a fixed desk setup, the Redragon DHARMA K556 HE is the better investment. If your priority is maximizing mouse space for gaming, need a keyboard to move around, or are on a tighter budget, the Redragon CASTOR K631 HE delivers the same core gaming performance in a much more portable package.

Redragon CASTOR K631 HE

+Compact 65% layout saves considerable desk space.
+Significantly lighter at 638 grams for easier portability.
+Includes a portable strap according to the vendor listing.
+Lower cost entry point for Hall Effect and rapid trigger features.

−Plastic case construction feels less premium than metal.
−Lacks a dedicated number pad and navigation cluster.
−Keycap material is not specified in the provided metadata.

Redragon DHARMA K556 HE

+Full-size 104-key layout includes a dedicated number pad.
+Aluminum case provides a solid, premium feel and weight.
+Includes PBT keycaps for better texture and durability.
+Features listed dual-layer sound dampening foam.

−Large and heavy (1130g), making it less portable.
−Higher price point than the compact model.
−The vendor notes its Hall Effect switches are incompatible with other brands.

Which Keyboard Is Better for Your Needs?

The DHARMA K556 HE is the clear choice for office work, programming, and content creation due to its full-size layout with a number pad and premium materials. The CASTOR K631 HE wins for travel and portability with its lightweight 65% design. For gaming and modding, the keyboards are closely matched on core performance specs, making it a tie that comes down to personal preference for desk space versus a fuller layout.

GamingTie

•Both feature an 8000Hz polling rate for low latency.
•Both include Hall Effect magnetic switches and rapid trigger technology.
•The DHARMA lists an additional PRCS SOCD gaming engine with 4 modes.
•The CASTOR's smaller footprint frees up more desk space for mouse movement.

OfficeRedragon DHARMA K556 HE

•The DHARMA's 100% layout includes a dedicated number pad for data entry.
•Its listed dual-layer sound dampening may reduce noise in shared spaces.
•The aluminum case and PBT keycaps suggest a more durable, premium feel for daily use.

ProgrammingRedragon DHARMA K556 HE

•The full-size layout ensures all number and function keys are readily available.
•PBT keycaps are generally more resistant to shine from long-term use.
•The aluminum build may provide a more stable typing platform.

TravelRedragon CASTOR K631 HE

•The CASTOR's 65% size (323mm wide) is significantly more compact than a full-size board.
•It weighs 638g, nearly half the weight of the 1130g DHARMA.
•The vendor description for the CASTOR includes a portable strap in the package.

ModdingTie

•Both are pre-built and vendor descriptions do not mention hot-swap sockets.
•Both include a keycap puller and four spare switches in the box.
•The DHARMA's aluminum case and listed bottom mount style may offer a different acoustic profile.

Content CreationRedragon DHARMA K556 HE

•The full-size layout's number pad is useful for timeline scrubbing and numerical shortcuts.
•The aluminum construction may feel more substantial and premium on camera.
•PBT keycaps offer better long-term aesthetics for a setup meant to be seen.