head to head
Castlevania III: Dracula's Curse asks more than Celeste, and the gap is optimization.

Execution · Pure Mechanics
The hardest NES Castlevania, with branching routes and switchable partner characters.

Execution · Pure Mechanics
A deterministic precision platformer about executing pixel-perfect dash routes.
Castlevania III: Dracula's Curse leans Execution (Pure Mechanics); Celeste leans Execution (Pure Mechanics).
Celeste leans a little harder on execution, though the gap is small.
Castlevania III: Dracula's Curse
Brutal platforming and tight whip timing throughout
Celeste
Pixel-perfect dashes and wavedashes are the entire skill.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Castlevania III: Dracula's Curse
Scripted enemies and bosses only
Celeste
No opponent; level hazards are fully scripted.
Castlevania III: Dracula's Curse leans a little harder on variance, though the gap is small.
Castlevania III: Dracula's Curse
Minor enemy spawn wobble
Celeste
Zero randomness; every screen is deterministic.
Castlevania III: Dracula's Curse leans clearly harder on optimization.
Castlevania III: Dracula's Curse
Partner choice, route branching, pattern memory
Celeste
Route choice and tech selection are learnable but light.
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.