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
A GBA metroidvania built around collecting enemy souls.

Optimization · Practiced Mastery
A mobile endless-runner spin-off of Crash Bandicoot with base-building elements.
Castlevania: Aria of Sorrow leans Optimization (Pure Optimization); Crash Bandicoot: On the Run! leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Castlevania: Aria of Sorrow
Modest action timing
Crash Bandicoot: On the Run!
Timed swipes and dodges in endless-runner segments.
Castlevania: Aria of Sorrow leans a little harder on reads, though the gap is small.
Castlevania: Aria of Sorrow
Scripted enemies
Crash Bandicoot: On the Run!
No opposing player, purely solo runner mechanics.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Castlevania: Aria of Sorrow
Soul drops are heavily random
Crash Bandicoot: On the Run!
Randomized run layouts and loot drops.
Castlevania: Aria of Sorrow leans a little harder on optimization, though the gap is small.
Castlevania: Aria of Sorrow
Soul build crafting dominates
Crash Bandicoot: On the Run!
Base-building and resource optimization define long-term progress.
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.