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

Optimization · Pure Optimization
A first-person factory builder that is pure logistics optimization.

Optimization · Pure Optimization
Pure factory-layout optimization with no pressure, randomness or opponent.
Satisfactory leans Optimization (Pure Optimization); Shapez 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.
Satisfactory
Light platforming, no real mechanical ceiling.
Shapez
Placing belts has no time pressure at all
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Satisfactory
No adaptive opponent in the world.
Shapez
No adversary exists anywhere
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Satisfactory
Resource nodes are fixed once mapped.
Shapez
The infinite map's shapes are mappable immediately
Satisfactory leans a little harder on optimization, though the gap is small.
Satisfactory
Ratios, logistics, and factory layout are everything.
Shapez
Designing efficient cutting and merging factories IS 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.