head to head
The Legend of Zelda: Majora's Mask 3D asks more than Portal, and the gap is variance.

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

Optimization · Pure Optimization
Scheduling and routing a repeating three-day world where every event is learnable and fixed.
Portal leans Optimization (Pure Optimization); The Legend of Zelda: Majora's Mask 3D 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.
Portal
Portal placement timing modest.
The Legend of Zelda: Majora's Mask 3D
Combat and platforming are deliberate, rarely twitch-demanding
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.
The Legend of Zelda: Majora's Mask 3D
NPCs run fixed three-day schedules, nothing adapts
The Legend of Zelda: Majora's Mask 3D leans clearly harder on variance.
Portal
Deterministic chambers; no randomness.
The Legend of Zelda: Majora's Mask 3D
Schedules and secrets are unknown until discovered, then fixed
Portal leans a little harder on optimization, though the gap is small.
Portal
Pure puzzle-solving optimization.
The Legend of Zelda: Majora's Mask 3D
Planning the time loop around NPC schedules is the game
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.