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

Optimization · Pure Optimization
On-rails photography game about provoking and capturing the perfect Pokémon shot.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Pokémon Snap 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.
Pokémon Snap
Timing photos on a moving rail
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.
Pokémon Snap
Creature behavior is fully scripted
Portal
No adversary modeling player.
Pokémon Snap leans clearly harder on variance.
Pokémon Snap
Minor behavioral wiggle per run
Portal
Deterministic chambers; no randomness.
Portal leans a little harder on optimization, though the gap is small.
Pokémon Snap
Triggering rare poses is route knowledge
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.