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

Optimization · Pure Optimization
A racing team management game where tire strategy and car development optimization drive results.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Motorsport Manager leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Portal leans clearly harder on execution.
Motorsport Manager
No physical driving inputs; menu-driven management only
Portal
Portal placement timing modest.
Motorsport Manager leans clearly harder on reads.
Motorsport Manager
Rival teams adapt race strategy in limited but real ways
Portal
No adversary modeling player.
Motorsport Manager leans clearly harder on variance.
Motorsport Manager
Safety cars, weather changes, and mechanical failures introduce hidden chaos
Portal
Deterministic chambers; no randomness.
Motorsport Manager leans clearly harder on optimization.
Motorsport Manager
Pit timing, compound choice, and car development are deeply solvable systems
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.