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.

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

Execution · Practiced Mastery
Hornet's faster, harder metroidvania sequel built on acrobatic execution.
Castlevania III: Dracula's Curse leans Execution (Pure Mechanics); Hollow Knight: Silksong leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Castlevania III: Dracula's Curse
Brutal platforming and tight whip timing throughout
Hollow Knight: Silksong
Faster, harsher boss patterns demand sharper inputs
Hollow Knight: Silksong leans a little harder on reads, though the gap is small.
Castlevania III: Dracula's Curse
Scripted enemies and bosses only
Hollow Knight: Silksong
Enemies are scripted, not adaptive
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Castlevania III: Dracula's Curse
Minor enemy spawn wobble
Hollow Knight: Silksong
Secrets and routes hidden on first run
Hollow Knight: Silksong leans a little harder on optimization, though the gap is small.
Castlevania III: Dracula's Curse
Partner choice, route branching, pattern memory
Hollow Knight: Silksong
Tool builds and pattern mastery convert practice to wins
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.