I have been considering moving on from the old vbulletin 4.2.5 however I do not want to risk losing traffic. Is one forum software better than the other for SEO? If so do you have statistics to show it?
While both offer out of the box SEO benefits from vBulletin 4, the redirects and internal linking shouldn't be overlooked no matter where you land.
While you are testing the migration, make sure you test those redirects. Without redirects, and depending on the community, it can take years to recover any linking you may have going on.
See the posts by Chris D in the thread linked above.Chris D said:We don’t currently acknowledge that there are any significant shortcomings in our SEO approach.