head to head
Freelancer asks more than Portal, and the gap is variance.

Optimization · Pure Optimization
A space sim where trade-route economics and ship progression matter as much as the accessible dogfighting.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Freelancer leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Freelancer
Mouse-flight dogfighting with modest ceiling
Portal
Portal placement timing modest.
Freelancer leans a little harder on reads, though the gap is small.
Freelancer
Pirate AI never adapts
Portal
No adversary modeling player.
Freelancer leans clearly harder on variance.
Freelancer
Random encounters along trade lanes
Portal
Deterministic chambers; no randomness.
Portal leans a little harder on optimization, though the gap is small.
Freelancer
Trade routes, ship upgrades, and faction standing are solvable
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.