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
Optimizing regional economics and city services to sustain growth without collapsing your budget.

Optimization · Pure Optimization
Colonize Mars by stacking dome layouts and supply chains.
SimCity 4 leans Optimization (Pure Optimization); Surviving Mars 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.
SimCity 4
Point-and-click placement; zero reflex requirement
Surviving Mars
pausable, no reflex
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
SimCity 4
Solo sandbox with no adversarial pressure
Surviving Mars
no adversary
Surviving Mars leans a little harder on variance, though the gap is small.
SimCity 4
Neighbor city interactions and demand curves add unpredictability
Surviving Mars
disasters, sponsor traits
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
SimCity 4
Budget, ordinances, and transport networks are the core puzzle
Surviving Mars
dome layouts and supply chains
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.