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 non-Euclidean exploration puzzle testing your willingness to abandon assumptions about space.

Optimization · Pure Optimization
A knowledge-based mystery solved by mapping a deterministic solar system.
Antichamber leans Optimization (Pure Optimization); Outer Wilds leans Optimization (Pure Optimization).
Outer Wilds leans a little harder on execution, though the gap is small.
Antichamber
Navigation has no twitch demands
Outer Wilds
Light piloting, mostly forgiving
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Antichamber
No opponent; solo non-Euclidean exploration
Outer Wilds
World is fixed; nothing adapts to you
Outer Wilds leans a little harder on variance, though the gap is small.
Antichamber
World is deterministic once its rules are understood
Outer Wilds
Loop is deterministic once understood
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Antichamber
Deducing the non-Euclidean spatial logic and gun mechanics governing each room
Outer Wilds
Pure knowledge puzzle - solve the system
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.