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 rhythm racer that turns any music file into a reflex puzzle track.

Execution · Pure Mechanics
Touch-rhythm accuracy with a gacha layer that only shapes score ceilings.
Audiosurf leans Execution (Pure Mechanics); BanG Dream! Girls Band Party! leans Execution (Pure Mechanics).
BanG Dream! Girls Band Party! leans a little harder on execution, though the gap is small.
Audiosurf
Lane-switching to the beat tests reaction speed.
BanG Dream! Girls Band Party!
Full-combo accuracy on dense charts is the real test
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Audiosurf
No opponent.
BanG Dream! Girls Band Party!
No opponent - multiplayer is parallel play
BanG Dream! Girls Band Party! leans a little harder on variance, though the gap is small.
Audiosurf
Track generated from song, then fixed.
BanG Dream! Girls Band Party!
Gacha decides your scoring ceiling, not your accuracy
Audiosurf leans a little harder on optimization, though the gap is small.
Audiosurf
Block-matching color strategy learnable per song.
BanG Dream! Girls Band Party!
Band composition and skill timing tune score output
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.