head to head
Outward asks more than Portal, and the gap is variance.

Optimization · Pure Optimization
Survival RPG where preparation and logistics matter more than reflexes.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Outward leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Outward
Deliberate stamina combat, punishing but slow
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.
Outward
Enemies use fixed behaviors
Portal
No adversary modeling player.
Outward leans clearly harder on variance.
Outward
Dynamic defeat outcomes and weather hazards
Portal
Deterministic chambers; no randomness.
Portal leans a little harder on optimization, though the gap is small.
Outward
Backpack economy, preparation, and build crafting
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.