head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Optimization · Pure Optimization
Optimising a daily calendar and persona fusion economy against scripted turn-based combat.

Optimization · Pure Optimization
Type-matchup math and team construction across a scripted Sinnoh campaign.
Persona 3 FES leans Optimization (Pure Optimization); Pokémon Pearl Version 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.
Persona 3 FES
Menu-driven turn battles need no physical skill
Pokémon Pearl Version
Menu-driven battles need no dexterity
Pokémon Pearl Version leans a little harder on reads, though the gap is small.
Persona 3 FES
Shadow AI is scripted weakness-exploitation, never adaptive
Pokémon Pearl Version
Gym leaders are scripted; online battles are optional
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Persona 3 FES
Tartarus floors, shuffle cards and fusion outcomes are randomised
Pokémon Pearl Version
Encounter tables and battle rolls are mappable RNG
Persona 3 FES leans a little harder on optimization, though the gap is small.
Persona 3 FES
Social link scheduling and persona fusion are a solvable calendar
Pokémon Pearl Version
Team building and type matchups are the solvable core
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.