[Meanee]

When Vogue's official upgrade came out, you've downloaded a utility, not much different from a typical RUU back then, that advised you to back up all your documents, programs, etc. It was a full re-flash of a phone.

While I cannot say for the future, how 6.5 upgrade will work, but I can say, with 99.9% certainty that you will have to reinstall all of your things. Some may not be compatible with 6.5, so it may be trial and error.