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
A GBA metroidvania built around collecting enemy souls.

Optimization · Practiced Mastery
The first Dishonored: a stealth-action playground of layered powers.
Castlevania: Aria of Sorrow leans Optimization (Pure Optimization); Dishonored leans Optimization (Practiced Mastery).
Dishonored leans a little harder on execution, though the gap is small.
Castlevania: Aria of Sorrow
Modest action timing
Dishonored
Blink timing and combat inputs matter.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Castlevania: Aria of Sorrow
Scripted enemies
Dishonored
Guard AI scripted, non-adaptive.
Castlevania: Aria of Sorrow leans a little harder on variance, though the gap is small.
Castlevania: Aria of Sorrow
Soul drops are heavily random
Dishonored
Patrol timings vary mildly.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Castlevania: Aria of Sorrow
Soul build crafting dominates
Dishonored
Power combos and stealth routes solvable.
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.