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

Optimization · Pure Optimization
Immersive sim aboard Talos I where build and route choices dominate.

Optimization · Pure Optimization
A Viking survival game where preparing properly trivialises each biome boss.
Prey (2017) leans Optimization (Pure Optimization); Valheim leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Prey (2017)
Wrench and Gloo timing modest.
Valheim
Block-and-parry timing matters in boss fights.
Prey (2017) leans a little harder on reads, though the gap is small.
Prey (2017)
Typhon AI scripted, not adaptive.
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.
Prey (2017)
Mimics and resource spawns randomized.
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.
Prey (2017)
Neuromods, builds, station routing deeply solvable.
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.