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

Optimization · Pure Optimization
The genre-defining metroidvania with deep RPG systems.

Optimization · Pure Optimization
Action-leaning Pokémon spinoff about catching in real time across ancient Hisui.
Castlevania: Symphony of the Night leans Optimization (Pure Optimization); Pokémon Legends: Arceus leans Optimization (Pure Optimization).
Castlevania: Symphony of the Night leans a little harder on execution, though the gap is small.
Castlevania: Symphony of the Night
Forgiving action combat
Pokémon Legends: Arceus
Real-time dodging, sneaking, and aimed throws
Castlevania: Symphony of the Night leans a little harder on reads, though the gap is small.
Castlevania: Symphony of the Night
Scripted bosses
Pokémon Legends: Arceus
Wild and boss behavior is scripted
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Castlevania: Symphony of the Night
Item drops and rare gear
Pokémon Legends: Arceus
Spawn tables and outbreak randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Castlevania: Symphony of the Night
Build crafting and sequence breaks
Pokémon Legends: Arceus
Research tasks and agile-strong style choices reward planning
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.