head to head
Valkyria Chronicles 4 asks more than Portal, and the gap is variance.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.

Optimization · Pure Optimization
A tactical action RPG where CP routing, class composition, and aimed execution carry missions against scripted enemy formations.
Portal leans Optimization (Pure Optimization); Valkyria Chronicles 4 leans Optimization (Pure Optimization).
Valkyria Chronicles 4 leans a little harder on execution, though the gap is small.
Portal
Portal placement timing modest.
Valkyria Chronicles 4
Aiming at enemy weak points and evasive movement add real execution demands
Valkyria Chronicles 4 leans a little harder on reads, though the gap is small.
Portal
No adversary modeling player.
Valkyria Chronicles 4
Enemy AI is scripted per mission; no adaptive human opponent
Valkyria Chronicles 4 leans clearly harder on variance.
Portal
Deterministic chambers; no randomness.
Valkyria Chronicles 4
Critical hit and evasion rolls add meaningful battlefield variance
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Portal
Pure puzzle-solving optimization.
Valkyria Chronicles 4
CP routing, class deployment, and order usage reward deliberate planning
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.