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

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

Optimization · Pure Optimization
Eastern-bloc planned-economy sim built on logistics chains.
Cities: Skylines leans Optimization (Pure Optimization); Workers & Resources: Soviet Republic leans Optimization (Pure Optimization).
Workers & Resources: Soviet Republic leans a little harder on execution, though the gap is small.
Cities: Skylines
No reflex demands at all.
Workers & Resources: Soviet Republic
no reflex
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.
Workers & Resources: Soviet Republic
no adversary
Workers & Resources: Soviet Republic leans a little harder on variance, though the gap is small.
Cities: Skylines
Minor disaster events if enabled.
Workers & Resources: Soviet Republic
weather, resource finds
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Cities: Skylines
Traffic flow, zoning, and budgets are fully solvable.
Workers & Resources: Soviet Republic
logistics chains and infrastructure central
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.