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

Optimization · Pure Optimization
Navigating civilization age transitions with deep optimization of legacy paths and economies.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Civilization VII leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Portal leans clearly harder on execution.
Civilization VII
Turn-based menu clicks; no physical ceiling
Portal
Portal placement timing modest.
Civilization VII leans clearly harder on reads.
Civilization VII
AI scripted per leader personality, not learning your habits
Portal
No adversary modeling player.
Civilization VII leans clearly harder on variance.
Civilization VII
Age transitions and hidden resources introduce genuine unknowns
Portal
Deterministic chambers; no randomness.
Civilization VII leans a little harder on optimization, though the gap is small.
Civilization VII
Legacy path and age-transition choices form the core optimization 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.