>>84882256It's the eyes and the overall face change mostly. I don't know how else to describe it other than it somehow looks a tiny bit more 3D and more cartoony. There are other slight changes too but they're lower on her body.
The good part about the 2.0 Gura got was that they weren't going to make a drastic change like changing her actual eye design, which I'm sure would have upset fans since Gura has some of the best eyes in hololive. Nacho really does eyes well.