head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

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

Optimization · Pure Optimization
A grand strategy 4X where empire optimization carries you through random crises.
Football Manager 26 leans Optimization (Pure Optimization); Stellaris 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.
Football Manager 26
Menus and team talks need no hands
Stellaris
Real-time pausable with no input precision.
Stellaris leans a little harder on reads, though the gap is small.
Football Manager 26
AI managers are mappable; online rivals rare
Stellaris
AI is scripted; multiplayer adds modest adaptation.
Stellaris leans a little harder on variance, though the gap is small.
Football Manager 26
Match engine rolls and injuries swing seasons
Stellaris
Galaxy gen, anomalies, and crises vary widely.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Football Manager 26
Squad building, tactics and finances are a solvable machine
Stellaris
Empire builds, fleet comps, and economy dominate.
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.