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 disaster-survival strategy game managing global catastrophes.

Optimization · Practiced Mastery
Community resource management under randomised zombie pressure, with light action execution.
Geostorm leans Optimization (Pure Optimization); State of Decay leans Optimization (Practiced Mastery).
State of Decay leans a little harder on execution, though the gap is small.
Geostorm
minor reaction to disaster events
State of Decay
Melee and driving are functional, not demanding
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Geostorm
no adaptive opponent present
State of Decay
Zombies swarm by simple rules, never adapting
State of Decay leans a little harder on variance, though the gap is small.
Geostorm
randomized disaster events and outcomes
State of Decay
Dynamic events, infestations and survivor traits roll randomly
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Geostorm
resource and defense system management
State of Decay
Base building, resource runs and survivor management are the game
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.