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
Relaxing trucking sim with company-building progression.

Optimization · Pure Optimization
On-rails photography game about provoking and capturing the perfect Pokémon shot.
Euro Truck Simulator 2 leans Optimization (Pure Optimization); Pokémon Snap 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.
Euro Truck Simulator 2
Truck handling, parking, gear control
Pokémon Snap
Timing photos on a moving rail
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Euro Truck Simulator 2
No adaptive opponents
Pokémon Snap
Creature behavior is fully scripted
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Euro Truck Simulator 2
Traffic, weather, cargo conditions
Pokémon Snap
Minor behavioral wiggle per run
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Euro Truck Simulator 2
Company growth, route, fleet management
Pokémon Snap
Triggering rare poses is route knowledge
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.