Lenovo - ThinkPad X1 Carbon Gen 13 vs ASUS - Zenbook S 14 UX5406

The Zenbook S 14 UX5406 edges ahead on the Mars Score (60 vs 64.2), but the 4.2-point gap is small enough that the right pick comes down to which spec advantages matter to you.

Pick the ThinkPad X1 Carbon Gen 13 if your top frustration with your current device is running out of charge before the day ends — endurance is the lead spec here. The biggest gaps in its favor are claimed battery life, weight.

Pick the Zenbook S 14 UX5406 if your top frustration with your current device is running out of charge before the day ends — endurance is the lead spec here. Its strongest claims are battery.

Both ship with comparable ram, storage, screen size, 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.