head to head
Neither is simply harder - they are hard in different places. Lorelai demands more variance; Portal demands more execution.

Optimization · Pure Optimization
A narrative horror journey testing patience and light puzzle-solving more than skill.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Lorelai leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Portal leans clearly harder on execution.
Lorelai
Point-and-click traversal with no twitch demands
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.
Lorelai
No adaptive opponent in this scripted story
Portal
No adversary modeling player.
Lorelai leans clearly harder on variance.
Lorelai
Story beats are unknown until experienced, then fixed
Portal
Deterministic chambers; no randomness.
Portal leans clearly harder on optimization.
Lorelai
Light adventure-game puzzles with discoverable solutions
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.