Which part of the chapter black arc? At minimum he's a mountain buster with super speed (end of Dark Tournament arc/Start of Chapter Black), at the very end he's a full fledged demon who one shots a mountain buster in Sensui who, previously, tanked mountain buster level damage(literally completely unphased by Hiei's dragon, which is A class and well beyond mountain buster level damage).
I'm pretty sure Yusuke stomps. What's she hulk's best durability feat?
2. From what i've heard, She-Hulk's durability is mountain level as well, and if IIRC she's even gone hand to hand with a few Class 100 characters (I.E. Hulk). Admittedly, it does sound a bit like PIS, but I personally believe it counts for something at least.
I think Yusuke hits hard enough to seriously damage her (he's above mountain buster level when he beats Toguro) and he's most assuredly got the speed advantage, not to mention he's got serious regeneration feats after getting the spirit wave orb, I don't think She Hulk could put him down even if she could fight evenly.