head to head
Pokemon Legends: Z-A asks more than Portal, and the gap is variance.

Optimization · Pure Optimization
A real-time Pokemon adventure set entirely within a redeveloping Lumiose City, reviving Mega Evolution.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Pokemon Legends: Z-A 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.
Pokemon Legends: Z-A
Real-time battle positioning and dodge timing matter
Portal
Portal placement timing modest.
Pokemon Legends: Z-A leans a little harder on reads, though the gap is small.
Pokemon Legends: Z-A
Opponents follow patterns, not adaptive minds
Portal
No adversary modeling player.
Pokemon Legends: Z-A leans clearly harder on variance.
Pokemon Legends: Z-A
Wild spawns and catch outcomes stay random
Portal
Deterministic chambers; no randomness.
Portal leans a little harder on optimization, though the gap is small.
Pokemon Legends: Z-A
Move loadouts and Mega strategy drive progress
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.