head to head
Deus Ex: Invisible War asks more than Portal, and the gap is variance.

Optimization · Pure Optimization
A streamlined immersive sim where biomod builds and route choice outweigh combat skill.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Deus Ex: Invisible War leans Optimization (Pure Optimization); Portal 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.
Deus Ex: Invisible War
Forgiving FPS combat with stealth options.
Portal
Portal placement timing modest.
Deus Ex: Invisible War leans a little harder on reads, though the gap is small.
Deus Ex: Invisible War
Enemy AI is simple and scripted.
Portal
No adversary modeling player.
Deus Ex: Invisible War leans clearly harder on variance.
Deus Ex: Invisible War
Level secrets are unknown only on first pass.
Portal
Deterministic chambers; no randomness.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Deus Ex: Invisible War
Biomod choices and route selection are the deciding layer.
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.