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
A 1998 grand strategy game pitting Empire against Rebellion across a fog-shrouded galaxy.

Optimization · Pure Optimization
A grand strategy 4X where empire optimization carries you through random crises.
Star Wars: Rebellion 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.
Star Wars: Rebellion
Pausable grand strategy; no hands required
Stellaris
Real-time pausable with no input precision.
Stellaris leans a little harder on reads, though the gap is small.
Star Wars: Rebellion
Head-to-head play adds light human mind games
Stellaris
AI is scripted; multiplayer adds modest adaptation.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Star Wars: Rebellion
Fog of war and hidden agent missions conceal the galaxy
Stellaris
Galaxy gen, anomalies, and crises vary widely.
Stellaris leans a little harder on optimization, though the gap is small.
Star Wars: Rebellion
Fleet logistics and mission scheduling reward systematic play
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.