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 calm test of figuring out season-switching environmental puzzles.

Optimization · Pure Optimization
A management game about ferrying spirits to the afterlife.
Seasons after Fall leans Optimization (Pure Optimization); Spiritfarer 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.
Seasons after Fall
Relaxed platforming with no fail-pressure
Spiritfarer
Platforming is light and forgiving.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Seasons after Fall
No enemies or opponents at all
Spiritfarer
Spirits follow scripted arcs.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Seasons after Fall
World is fixed, nothing random
Spiritfarer
Minor resource RNG.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Seasons after Fall
Season-switching puzzles have single intended solutions
Spiritfarer
Boat layout and crafting loops 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.