It's just like Mike said.
They are different kind of games, you can't really compared them imo.
Xenoverse is a casual (not competitive) fighting game with some RPG features, just some. The type of game you grab and play from time to time with friends. The only reason I bought XV1 is because I loved DBO and wanted to see what the story would end up being. That's why I didn't buy XV2, it's just pointless. Same game, might aswell have been an update to XV1.
On the other hand, DBO was/is an MMORPG, something completely different than a casual fighting game.
You can only say which one you liked better.
If I gotta be honest, I think I liked XV better than DBO. DBO is such a flawed game, I love it, but it really isn't that good of a game (not to mention it's another p2w one xD).