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
JRPG where you program party AI through its gambit system.

Optimization · Pure Optimization
Open-world Pokémon where you tackle gyms and titans in any order.
Final Fantasy XII leans Optimization (Pure Optimization); Pokémon Scarlet 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.
Final Fantasy XII
Gambits automate combat away from the hands
Pokémon Scarlet
Open-world traversal, battles stay menu-based
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Final Fantasy XII
Enemy AI is fixed and exploitable
Pokémon Scarlet
NPC trainers never adapt
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Final Fantasy XII
Rare spawns and drop RNG
Pokémon Scarlet
Open-world spawns and tera raids
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Final Fantasy XII
Programming gambit logic IS the gameplay
Pokémon Scarlet
Terastallize typing adds a planning layer
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.