Roughly what difficulty range is osu mania 3* equivalent to in this game?

As the title says I’m an incoming new player and wondering what difficulty range 3* in O!M is equivalent to in this game

3-3.5* is like 12-15 MSD. That’s roughly when I started playing Etterna.

it depends a lot of the pattern. the higher the note density the higher the star rating in osu. for denser files, the 10-15 msd range is mostly what would be categorized as 3star. some more technical and fast streamy files can be as high as 15-19 in the 3star range.