Kaguya's taking it. High-extreme diff.

Kaguya Takes Mid Diff

Kaguya definitely has better hax and better DP (maybe? Due to her creating a star and then some) but Momo can probably out-box her close quarters.

Not to mention her Expansive Truth Seeking Ball...

Idrk how Momoshiki would interact with that though.

Kaguya medium diff

Momo. Medium or high tier difficulty I think question mark