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
A farm-life sim solved by season routing and profit optimization.

Optimization · Pure Optimization
Colonize Mars by stacking dome layouts and supply chains.
Stardew Valley 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.
Stardew Valley
Trivial timing on fishing and combat
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.
Stardew Valley
No adaptive opponent exists
Surviving Mars
no adversary
Surviving Mars leans a little harder on variance, though the gap is small.
Stardew Valley
Crop luck and geode RNG matter modestly
Surviving Mars
disasters, sponsor traits
Surviving Mars leans a little harder on optimization, though the gap is small.
Stardew Valley
Routing seasons, profit loops, and bundles dominates
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.