I'm still looking over all of what xenForo currently has to offer compared to vBulletin, one thing I did notice that xenforo doesn't have is an add-on or built-in function - rewrite links to affiliate links. Example, the vbulletin add-on Rewrite ebay links - this addon has been huge for me. In fact anyone that runs a forum that has members posting ebay links, even just sometimes I highly recommend them checking it out. While I don't go into details about how much I've made I will say it's enough that I couldn't possibly leave vBulletin even for a better piece of software without this being either a built-in feature or add-on. I would have put this in the add-on request forum but since I'm not a customer yet I don't have access too.