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

Optimization · Pure Optimization
An optimisation puzzle about historical pathfinding against variable events.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Humankind leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Portal leans clearly harder on execution.
Humankind
Micro-management speed matters little; macro is king.
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.
Humankind
AI opponents lack true adaptation; no human element.
Portal
No adversary modeling player.
Humankind leans clearly harder on variance.
Humankind
Era choices and event randomness create replayability.
Portal
Deterministic chambers; no randomness.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Humankind
Dominating systems and cultures is a deep optimisation puzzle.
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.