ASUS - ROG Ally X vs Valve - Steam Deck LCD 256GB

The ROG Ally X is the clear pick on raw spec strength, leading by 18.7 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.

Pick the ROG Ally X 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 storage, max refresh, ram, among others.

The Steam Deck LCD 256GB similarly doesn't carry a headline advantage on the popular specs — look at the full table for category-specific deltas.

Both ship with comparable max resolution, disc drive, vr support, so those specs don't separate the two — focus on the differences below.

Bottom line: the ROG Ally X is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.