head to head
Neither is simply harder - they are hard in different places. King's League II demands more variance; Portal demands more execution.

Optimization · Pure Optimization
A tactical management game training a team of warriors for battle.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
King's League II leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Portal leans clearly harder on execution.
King's League II
minimal direct execution, auto-battle style
Portal
Portal placement timing modest.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
King's League II
AI opponents follow fixed logic, not adaptive
Portal
No adversary modeling player.
King's League II leans clearly harder on variance.
King's League II
battle outcomes involve randomized rolls
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.
King's League II
team building, training, and management depth
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.