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
Meditative cleaning sim about systematic spray work.

Optimization · Practiced Mastery
Slow-burn revenge adventure built on daily routines, detective legwork, and QTEs in 1986 Yokosuka.
PowerWash Simulator leans Optimization (Pure Optimization); Shenmue leans Optimization (Practiced Mastery).
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
Shenmue
QTEs and light brawling demand modest timing
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
Shenmue
NPCs run daily scripts; nothing adapts to you
Shenmue leans a little harder on variance, though the gap is small.
PowerWash Simulator
Minimal, dirt is fixed
Shenmue
First playthrough leans on not knowing schedules and clues
PowerWash Simulator leans a little harder on optimization, though the gap is small.
PowerWash Simulator
Nozzle choice, routing, completion efficiency
Shenmue
Clue order, NPC schedules, and move training are fully mappable
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.