head to head
Neither is simply harder - they are hard in different places. Lorelei and the Laser Eyes demands more variance; Portal demands more execution.

Optimization · Pure Optimization
An austere puzzle labyrinth where every room presents a closed logical system that must be fully solved.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Lorelei and the Laser Eyes leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Portal leans clearly harder on execution.
Lorelei and the Laser Eyes
Minimal motor demand; all puzzles are cognitive
Portal
Portal placement timing modest.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Lorelei and the Laser Eyes
Surreal manor setting has no adaptive opponent
Portal
No adversary modeling player.
Lorelei and the Laser Eyes leans clearly harder on variance.
Lorelei and the Laser Eyes
Some hidden room states and obscured clues require discovery
Portal
Deterministic chambers; no randomness.
Lorelei and the Laser Eyes leans clearly harder on optimization.
Lorelei and the Laser Eyes
Every puzzle is a precisely designed closed logic problem with exactly one valid solution
Portal
Pure puzzle-solving optimization.
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.