head to head
Neither is simply harder - they are hard in different places. Capes demands more reads; Portal demands more execution.

Optimization · Pure Optimization
A turn-based superhero tactics game about optimizing team synergies and positioning.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Capes leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Portal leans clearly harder on execution.
Capes
Turn-based, no manual aim or reflex
Portal
Portal placement timing modest.
Capes leans clearly harder on reads.
Capes
Enemy AI is scripted, limited adaptive prediction
Portal
No adversary modeling player.
Capes leans clearly harder on variance.
Capes
Few random elements; outcomes are mostly deterministic
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.
Capes
Ability synergies, positioning, and team composition are the core
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.