head to head
Portal asks more than BoxBoxBoy!, and the gap is execution.

Optimization · Pure Optimization
A minimalist puzzle platformer about deducing box-chain solutions.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
BoxBoxBoy! leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Portal leans clearly harder on execution.
BoxBoxBoy!
Box creation and movement need no precision
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.
BoxBoxBoy!
Solo puzzle game with no opponent
Portal
No adversary modeling player.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
BoxBoxBoy!
Puzzles fully deterministic, nothing random
Portal
Deterministic chambers; no randomness.
BoxBoxBoy! leans a little harder on optimization, though the gap is small.
BoxBoxBoy!
Deducing box-chain shapes to clear obstacles is the game
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.