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

Optimization · Pure Optimization
Tests methodical scene-searching and fixed puzzle deduction through a supernatural detective story.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Adam Wolfe leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Portal leans clearly harder on execution.
Adam Wolfe
Clicking hidden objects and puzzle pieces - no twitch demand
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.
Adam Wolfe
Solo paranormal story with no adaptive opponent
Portal
No adversary modeling player.
Adam Wolfe leans clearly harder on variance.
Adam Wolfe
Scene layouts and clues are unknown until searched
Portal
Deterministic chambers; no randomness.
Portal leans clearly harder on optimization.
Adam Wolfe
Puzzles have fixed solutions found by systematic deduction
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.