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

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.

Optimization · Pure Optimization
Designing a functional prison where security infrastructure and inmate need management prevent catastrophic failure.
Portal leans Optimization (Pure Optimization); Prison Architect leans Optimization (Pure Optimization).
Portal leans clearly harder on execution.
Portal
Portal placement timing modest.
Prison Architect
Layout design is deliberate; no twitch demands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Portal
No adversary modeling player.
Prison Architect
Prisoner behaviour is scripted around needs and contraband rules
Prison Architect leans clearly harder on variance.
Portal
Deterministic chambers; no randomness.
Prison Architect
Riots and smuggling attempts introduce meaningful hidden threats
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Portal
Pure puzzle-solving optimization.
Prison Architect
Guard routing, cell ratios, and utility networks are deeply solvable
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.