head to head
Portal asks more than The Gardens Between, and the gap is execution.

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

Optimization · Pure Optimization
Serene puzzler where rewinding time untangles dioramas of childhood memories.
Portal leans Optimization (Pure Optimization); The Gardens Between leans Optimization (Pure Optimization).
Portal leans clearly harder on execution.
Portal
Portal placement timing modest.
The Gardens Between
Only scrubbing time forward and back
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 Gardens Between
No opposition exists
The Gardens Between leans a little harder on variance, though the gap is small.
Portal
Deterministic chambers; no randomness.
The Gardens Between
Deterministic dioramas
Portal leans a little harder on optimization, though the gap is small.
Portal
Pure puzzle-solving optimization.
The Gardens Between
Each island is a clean time-manipulation logic puzzle
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.