I think the girls got a lot creative freedom inside yg. Main difference is that, they can release significantly more songs now.
Rosé got similar classical instruments like guitar in her music, like she got for Gone
Jisoo music is very similar too, it is similar EDM music
Lisa, I don't think her music is really that far what she got inside YG?
Jennie is the most different, but she said herself her album is like buffet, little bit everything for everyone