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 speedy GBA metroidvania that doubles its castle into two mirrored layouts to untangle.

Optimization · Pure Optimization
A hybrid real-time and tactical action RPG in a digital city.
Castlevania: Harmony of Dissonance leans Optimization (Pure Optimization); Transistor 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.
Castlevania: Harmony of Dissonance
Fast dashes make combat forgiving.
Transistor
Real-time and planned hybrid combat.
Transistor leans a little harder on reads, though the gap is small.
Castlevania: Harmony of Dissonance
Scripted enemies and bosses.
Transistor
Process enemies follow scripts.
Transistor leans a little harder on variance, though the gap is small.
Castlevania: Harmony of Dissonance
Minor relic and drop luck.
Transistor
Limited randomness.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Castlevania: Harmony of Dissonance
Twin-castle navigation and spellbook combos carry it.
Transistor
Function loadouts have deep optimization.
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.