Valve - Steam Deck LCD 256GB vs Microsoft - Xbox Series S 512GB

The Xbox Series S 512GB edges ahead on the Mars Score (52.2 vs 56.1), but the 3.9-point gap is small enough that the right pick comes down to which spec advantages matter to you.

Pick the Steam Deck LCD 256GB if you push the hardware — gaming, on-device AI, heavy multitasking — and the extra compute headroom is worth the trade-offs. The biggest gaps in its favor are ram.

Pick the Xbox Series S 512GB if you care most about storage / max refresh. Its strongest claims are storage, max refresh, ray tracing, among others.

Both ship with comparable disc drive, vr support, so those specs do not separate the two — focus on the differences below.

Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.