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
Meditative cleaning sim about systematic spray work.

Optimization · Pure Optimization
Zelda-style puzzle dungeons and exploration with low-pressure combat.
PowerWash Simulator leans Optimization (Pure Optimization); Star Fox Adventures 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.
PowerWash Simulator
Aim and sweep nozzle precision
Star Fox Adventures
Lock-on staff combat is deliberately forgiving
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
PowerWash Simulator
No adaptive opponents
Star Fox Adventures
Dinosaurs and bosses are Rare-scripted patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
PowerWash Simulator
Minimal, dirt is fixed
Star Fox Adventures
Dinosaur Planet is fixed and explorable
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
PowerWash Simulator
Nozzle choice, routing, completion efficiency
Star Fox Adventures
Zelda-style dungeon puzzles and item routing are the substance
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.