head to head
The Legend of Zelda: Spirit Tracks asks more than Portal, and the gap is variance.

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

Optimization · Pure Optimization
A touch-controlled DS Zelda about puzzling through dungeons and driving a train across Hyrule.
Portal leans Optimization (Pure Optimization); The Legend of Zelda: Spirit Tracks 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: Spirit Tracks
Stylus combat and flute playing are forgiving
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: Spirit Tracks
Phantoms patrol on fixed rules
The Legend of Zelda: Spirit Tracks leans clearly harder on variance.
Portal
Deterministic chambers; no randomness.
The Legend of Zelda: Spirit Tracks
Unknown layouts only until explored
Portal leans a little harder on optimization, though the gap is small.
Portal
Pure puzzle-solving optimization.
The Legend of Zelda: Spirit Tracks
Rail routing and tower puzzles are the core
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.