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 sprawling open-world RPG where build and system mastery outweigh its combat.

Optimization · Pure Optimization
A Viking survival game where preparing properly trivialises each biome boss.
The Elder Scrolls V: Skyrim - Anniversary Edition leans Optimization (Pure Optimization); Valheim leans Optimization (Pure Optimization).
Valheim leans a little harder on execution, though the gap is small.
The Elder Scrolls V: Skyrim - Anniversary Edition
real-time combat but fairly forgiving
Valheim
Block-and-parry timing matters in boss fights.
The Elder Scrolls V: Skyrim - Anniversary Edition leans a little harder on reads, though the gap is small.
The Elder Scrolls V: Skyrim - Anniversary Edition
solo RPG, no adaptive enemies
Valheim
Enemies follow scripted AI; no adaptation.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
The Elder Scrolls V: Skyrim - Anniversary Edition
loot rolls and random encounters
Valheim
World seed and biome layout introduce mild randomness.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
The Elder Scrolls V: Skyrim - Anniversary Edition
deep build, perk, and gear optimization
Valheim
Gear progression and base infrastructure define progress.
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.