head to head
Neither is simply harder - they are hard in different places. Football Manager 26 demands more variance; Portal demands more execution.

Optimization · Pure Optimization
Tests long-horizon squad-building and tactical optimisation against simulation noise.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Football Manager 26 leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Portal leans clearly harder on execution.
Football Manager 26
Menus and team talks need no hands
Portal
Portal placement timing modest.
Football Manager 26 leans clearly harder on reads.
Football Manager 26
AI managers are mappable; online rivals rare
Portal
No adversary modeling player.
Football Manager 26 leans clearly harder on variance.
Football Manager 26
Match engine rolls and injuries swing seasons
Portal
Deterministic chambers; no randomness.
Football Manager 26 leans a little harder on optimization, though the gap is small.
Football Manager 26
Squad building, tactics and finances are a solvable machine
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.