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 · Practiced Mastery
A cult action RPG about climbing giant monsters with AI pawns.
Castlevania: Symphony of the Night leans Optimization (Pure Optimization); Dragon's Dogma leans Optimization (Practiced Mastery).
Dragon's Dogma leans a little harder on execution, though the gap is small.
Castlevania: Symphony of the Night
Forgiving action combat
Dragon's Dogma
Climbing monsters and timing skills by hand
Castlevania: Symphony of the Night leans a little harder on reads, though the gap is small.
Castlevania: Symphony of the Night
Scripted bosses
Dragon's Dogma
Pawns and monsters run fixed logic
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
Dragon's Dogma
Night dangers and loot unknown early
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
Dragon's Dogma
Vocations, pawn setups, and augments run deep
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.