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

Optimization · Pure Optimization
A Pathfinder system-mastery game where feat optimization and kingdom timeline routing determine survival.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Pathfinder: Kingmaker leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Portal leans clearly harder on execution.
Pathfinder: Kingmaker
Real-time-with-pause removes twitch; timed kingdom events add pressure marginally
Portal
Portal placement timing modest.
Pathfinder: Kingmaker leans a little harder on reads, though the gap is small.
Pathfinder: Kingmaker
All enemies and advisors follow scripted patterns without player modelling
Portal
No adversary modeling player.
Pathfinder: Kingmaker leans clearly harder on variance.
Pathfinder: Kingmaker
Hidden ability check thresholds and timed kingdom deadlines create unknowns
Portal
Deterministic chambers; no randomness.
Pathfinder: Kingmaker leans clearly harder on optimization.
Pathfinder: Kingmaker
Pathfinder feat chains and kingdom management routing have known optimal solutions
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.