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
Grim space colony sim about keeping a generation-ship station from collapsing.

Optimization · Pure Optimization
Optimizing regional economics and city services to sustain growth without collapsing your budget.
IXION leans Optimization (Pure Optimization); SimCity 4 leans Optimization (Pure Optimization).
SimCity 4 leans a little harder on execution, though the gap is small.
IXION
Pause-friendly station management
SimCity 4
Point-and-click placement; zero reflex requirement
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
IXION
Events follow story scripts
SimCity 4
Solo sandbox with no adversarial pressure
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
IXION
System events and exploration outcomes vary
SimCity 4
Neighbor city interactions and demand curves add unpredictability
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
IXION
Hull sectors, power, and population logistics dominate
SimCity 4
Budget, ordinances, and transport networks are the core puzzle
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.