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
Open-world Pokémon where you tackle gyms and titans in any order.

Optimization · Pure Optimization
The sequel expands the mechanical puzzle boxes into full eerie rooms spanning crypts, ships, and seances.
Pokémon Scarlet leans Optimization (Pure Optimization); The Room Two 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.
Pokémon Scarlet
Open-world traversal, battles stay menu-based
The Room Two
Slow tactile fiddling, zero dexterity bar
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Pokémon Scarlet
NPC trainers never adapt
The Room Two
No opponent exists
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Pokémon Scarlet
Open-world spawns and tera raids
The Room Two
Unknown contraptions until explored, then fixed
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Pokémon Scarlet
Terastallize typing adds a planning layer
The Room Two
Fixed mechanical puzzles with single deducible solutions
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.