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

Execution · Pure Mechanics
A bullet-hell shooter testing precision dodging through dense scripted patterns.

Execution · Pure Mechanics
A relentless wave-clearing shooter that tests sustained aim and movement against massive scripted enemy crowds.
Bullet Heaven 2 leans Execution (Pure Mechanics); Painkiller (2004) leans Execution (Pure Mechanics).
Bullet Heaven 2 leans a little harder on execution, though the gap is small.
Bullet Heaven 2
Dodging dense bullet patterns is the whole game
Painkiller (2004)
Constant crowd-control movement against overwhelming enemy counts demands fast aim
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Bullet Heaven 2
Bosses fire scripted patterns, not adaptive
Painkiller (2004)
All enemies are scripted waves with fixed attack patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Bullet Heaven 2
Item drops add minor randomness
Painkiller (2004)
Enemy counts and placements are fixed with minimal unknown elements
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Bullet Heaven 2
Character and weapon choice optimize survival underneath
Painkiller (2004)
Tarot card selection and level routing provide a thin solvable layer
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.