head to head
Pikmin 4 asks more than Portal, and the gap is variance.

Optimization · Pure Optimization
Strategy game that makes time-efficient task planning, dandori, its central creed.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Pikmin 4 leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Portal leans a little harder on execution, though the gap is small.
Pikmin 4
Forgiving controls with rewind safety net
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.
Pikmin 4
Creatures never adapt to you
Portal
No adversary modeling player.
Pikmin 4 leans clearly harder on variance.
Pikmin 4
Layouts fixed; night missions add mild chaos
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.
Pikmin 4
Dandori time-efficiency planning is the explicit core
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.