head to head
Faces of War asks more than Portal, and the gap is variance.

Optimization · Pure Optimization
A realistic WWII tactical squad-based strategy game about mission planning.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Faces of War leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Portal leans a little harder on execution, though the gap is small.
Faces of War
direct unit control requires some precision
Portal
Portal placement timing modest.
Faces of War leans clearly harder on reads.
Faces of War
AI and human opponents shift tactics somewhat
Portal
No adversary modeling player.
Faces of War leans clearly harder on variance.
Faces of War
combat outcomes have random elements
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.
Faces of War
squad tactics and mission planning deep
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.