[quote]for all we know, Vic and Vince could hate eachother[/quote]
I did the math, and here it is:
According to QT, when he wants to make the movie, he plans to have Vic and Vince running a club in Amsterdam right before Pulp Fiction (because, obviously, they make the point of Vince just getting back from Amsterdam) they could even work in Mia Wallace (due to the fact that QT loves Uma, and she made the comment of chilling in Amsterdam). Since Vince just got back from Amsterdam, and in Reservoir Dogs, Vic has been in jail for four years, clearly Dogs is four years after Fiction. Therefore, maybe it’s not so much personal animosity, but on Vic’s side, his brother’s been dead the whole time he was in the slammer, and Vince has just spent four years with his brother, and each of them work for a different gang lord.