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 · Pure Optimization
A first-person farming game about wrangling adorable slimes for plorts.
Geostorm leans Optimization (Pure Optimization); Slime Rancher leans Optimization (Pure Optimization).
Geostorm leans a little harder on execution, though the gap is small.
Geostorm
minor reaction to disaster events
Slime Rancher
Vacuum aiming is gentle.
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
Slime Rancher
Slimes follow scripted behaviors.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Geostorm
randomized disaster events and outcomes
Slime Rancher
Plort prices and slime spawns vary.
Slime Rancher leans a little harder on optimization, though the gap is small.
Geostorm
resource and defense system management
Slime Rancher
Ranch layout and economy reward planning.
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.