Xenoverse wins neg diff any day. I mean come on, Revolutions has no story line (at least a proper one). We can create custom characters in Xenoverse and we get to use Super Saiyan God and freaking Beerus.
Xenoverse is a dumbed down version of Tenkaichi 3 and is very shitty online and 1 on 1 against a real player. Revolution is imo superior due to the canceling, counter, GB pill and overall flow of game and some troll combos (playing tennis with the enemy as Sasori + Nagato)
DBXV. I only played NUNSR for 2 days before getting Ultimate bored. DBXV gives you a new plot and the feature to create your own characters alone makes it more fun then NUNSR. I'm on lvl 55 and still aren't bored of the game, not to mention that i'm playing offline not online.