head to head
Deus Ex: Human Revolution - Director's Cut asks more than Portal 2, and the gap is variance.

Optimization · Pure Optimization
An immersive sim testing route planning and augmentation builds over raw shooting skill.

Optimization · Pure Optimization
A first-person puzzle game where seeing the solution is the whole skill.
Deus Ex: Human Revolution - Director's Cut leans Optimization (Pure Optimization); Portal 2 leans Optimization (Pure Optimization).
Deus Ex: Human Revolution - Director's Cut leans a little harder on execution, though the gap is small.
Deus Ex: Human Revolution - Director's Cut
Shooting works but stealth routes bypass most twitch demands
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.
Deus Ex: Human Revolution - Director's Cut
Guard AI follows mappable patrol scripts, never adapting
Portal 2
No opponent; puzzles are static.
Deus Ex: Human Revolution - Director's Cut leans clearly harder on variance.
Deus Ex: Human Revolution - Director's Cut
Vents, codes and routes are unknown until explored
Portal 2
Puzzles are deterministic with no randomness.
Portal 2 leans a little harder on optimization, though the gap is small.
Deus Ex: Human Revolution - Director's Cut
Praxis builds and route planning through levels are the real game
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.