head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Optimization · Pure Optimization
A Viking survival game where preparing properly trivialises each biome boss.

Optimization · Pure Optimization
A class-swapping JRPG carried by art-rotation and ouroboros build optimization.
Valheim leans Optimization (Pure Optimization); Xenoblade Chronicles 3 leans Optimization (Pure Optimization).
Valheim leans a little harder on execution, though the gap is small.
Valheim
Block-and-parry timing matters in boss fights.
Xenoblade Chronicles 3
Auto-attack with art-timing inputs
Xenoblade Chronicles 3 leans a little harder on reads, though the gap is small.
Valheim
Enemies follow scripted AI; no adaptation.
Xenoblade Chronicles 3
Scripted enemies
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Valheim
World seed and biome layout introduce mild randomness.
Xenoblade Chronicles 3
Loot and gem rolls
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Valheim
Gear progression and base infrastructure define progress.
Xenoblade Chronicles 3
Class, art, and ouroboros builds deeply rewarded
A matching score does not mean a matching test. Two games can both sit at 10 on execution and demand completely different things of you - which is why the reasoning above matters more than the number beside it.