head to head
Portal 2 asks more than Gunpoint, and the gap is optimization.

Optimization · Pure Optimization
Noir stealth puzzler about rewiring buildings so guards defeat themselves.

Optimization · Pure Optimization
A first-person puzzle game where seeing the solution is the whole skill.
Gunpoint leans Optimization (Pure Optimization); Portal 2 leans Optimization (Pure Optimization).
Portal 2 leans a little harder on execution, though the gap is small.
Gunpoint
Jump timing matters occasionally, lightly
Portal 2
Portal placement requires some precision but timing is lenient.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Gunpoint
Guards patrol on fixed scripts
Portal 2
No opponent; puzzles are static.
Gunpoint leans a little harder on variance, though the gap is small.
Gunpoint
Levels fully visible and deterministic
Portal 2
Puzzles are deterministic with no randomness.
Portal 2 leans clearly harder on optimization.
Gunpoint
Crosslink rewiring puzzles have clean optimal solutions
Portal 2
Solving the puzzle's logic IS the entire 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.