Hiei wins this, hands down. I've seen enough evidence posted here and on other sites to know the outcome of this fight is in Hiei's favour. I find it funny, considering I once thought that Saiya-jin Saga Vegeta could solo the YYHverse.
I'm not a big one for vs. threads. I mainly observe and choose the more convincing side, and post fun stuff to break the ice ^_^. I thought this thread was great, because Vegeta and Hiei have quite a few parallels. For me, that means posting fun stuff!
Here, have some funny pictures from Yoshi-rin de Pon:
Yoshi-rin de Pon is written by YYH's creator, Yoshihiro Togashi. It has all sorts of crazy stuff: a fight between Majin Buu and Toguro, male characters drawn as female characters and also a rather disturbing KarasuXKurama pic... &_&