head to head
Neither is simply harder - they are hard in different places. Portal demands more execution; Silent Storm: Sentinels demands more variance.

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

Optimization · Pure Optimization
A turn-based tactics game about squad positioning in destructible WWII environments.
Portal leans Optimization (Pure Optimization); Silent Storm: Sentinels leans Optimization (Pure Optimization).
Portal leans clearly harder on execution.
Portal
Portal placement timing modest.
Silent Storm: Sentinels
Turn-based, no physical aiming demands on player
Silent Storm: Sentinels leans clearly harder on reads.
Portal
No adversary modeling player.
Silent Storm: Sentinels
AI scripted but tactical positioning resembles light prediction
Silent Storm: Sentinels leans clearly harder on variance.
Portal
Deterministic chambers; no randomness.
Silent Storm: Sentinels
Hit chances and destructible cover add real randomness
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.
Silent Storm: Sentinels
Squad builds, positioning and turn economy decide battles
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.