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

Optimization · Pure Optimization
A sandbox city builder that is pure traffic and zoning optimization.

Optimization · Pure Optimization
A classic Greek city builder of housing blocks, gods, and mythic monsters.
Cities: Skylines leans Optimization (Pure Optimization); Zeus: Master of Olympus 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.
Cities: Skylines
No reflex demands at all.
Zeus: Master of Olympus
Paused-friendly mouse planning
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Cities: Skylines
No adaptive opponent exists in the sandbox.
Zeus: Master of Olympus
Rival cities act on schedules
Zeus: Master of Olympus leans a little harder on variance, though the gap is small.
Cities: Skylines
Minor disaster events if enabled.
Zeus: Master of Olympus
Monster attacks and god visits semi-random
Cities: Skylines leans a little harder on optimization, though the gap is small.
Cities: Skylines
Traffic flow, zoning, and budgets are fully solvable.
Zeus: Master of Olympus
Walker logic, housing blocks, and economy are deeply solvable
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.