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

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

Execution · Pure Mechanics
A vertical bullet-hell shooter testing precise dodging and scoring chains.
Cuphead leans Execution (Pure Mechanics); DonPachi leans Execution (Pure Mechanics).
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.
DonPachi
Precise dodging through dense bullet patterns defines play
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.
DonPachi
Solo - enemies follow fixed bullet patterns
DonPachi leans a little harder on variance, though the gap is small.
Cuphead
Minor attack-order shuffling between phases.
DonPachi
Patterns fixed once memorized, minimal randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Cuphead
Loadouts and boss phase order are fully learnable.
DonPachi
Chaining and weapon choice maximize score
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.