head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Pure Optimization
A prehistoric settlement survival builder about guiding a tribe from stone age to iron age.

Optimization · Pure Optimization
A farm-life sim solved by season routing and profit optimization.
Dawn of Man leans Optimization (Pure Optimization); Stardew Valley 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.
Dawn of Man
Light real-time camera and command work only.
Stardew Valley
Trivial timing on fishing and combat
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Dawn of Man
Raiders and animals follow scripted, predictable behaviour.
Stardew Valley
No adaptive opponent exists
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dawn of Man
Raid timing, weather and animal migrations add unknowns.
Stardew Valley
Crop luck and geode RNG matter modestly
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Dawn of Man
Tech progression, food logistics and settlement layout decide survival.
Stardew Valley
Routing seasons, profit loops, and bundles dominates
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.