head to head
Portal asks more than Superliminal, and the gap is execution.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.

Optimization · Pure Optimization
A perspective puzzle game where objects resize to match how they look when you set them down.
Portal leans Optimization (Pure Optimization); Superliminal leans Optimization (Pure Optimization).
Portal leans clearly harder on execution.
Portal
Portal placement timing modest.
Superliminal
Forced-perspective placement needs light spatial precision
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Portal
No adversary modeling player.
Superliminal
No opponent; solo perspective puzzle
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Portal
Deterministic chambers; no randomness.
Superliminal
All rooms are deterministic
Portal leans a little harder on optimization, though the gap is small.
Portal
Pure puzzle-solving optimization.
Superliminal
Understanding forced-perspective growth rules to size objects into the correct shape
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.