head to head
Neither is simply harder - they are hard in different places. King's Bounty: The Legend demands more variance; Portal demands more execution.

Optimization · Pure Optimization
A turn-based tactical RPG where a treasure hunter leads stacked armies through hex battles across a fairy-tale world.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
King's Bounty: The Legend leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Portal leans clearly harder on execution.
King's Bounty: The Legend
Turn-based, no physical demands
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 Bounty: The Legend
Enemy stacks follow predictable AI scripts
Portal
No adversary modeling player.
King's Bounty: The Legend leans clearly harder on variance.
King's Bounty: The Legend
Item shops and map seeds vary slightly
Portal
Deterministic chambers; no randomness.
King's Bounty: The Legend leans a little harder on optimization, though the gap is small.
King's Bounty: The Legend
Army composition and no-loss tactics dominate entirely
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.