head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is optimization, and it is a single point.

Execution · Pure Mechanics
A run-and-gun boss rush about dodging scripted patterns with tight inputs.

Execution · Practiced Mastery
Cave's genre-defining bullet hell where survival is execution and score is a memorized chain route.
Cuphead leans Execution (Pure Mechanics); DoDonPachi 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.
Cuphead
Tight dodging and parry timing decide every boss.
DoDonPachi
Threading dense bullet curtains demands pixel-perfect movement
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Cuphead
Bosses cycle scripted phases; no adaptation to player.
DoDonPachi
Fixed scripted patterns, nothing adapts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Cuphead
Minor attack-order shuffling between phases.
DoDonPachi
Near-fully deterministic once patterns are learned
DoDonPachi leans a little harder on optimization, though the gap is small.
Cuphead
Loadouts and boss phase order are fully learnable.
DoDonPachi
Chain meter routing defines high-level play entirely
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.