I was just about to post this myself, but it appears this is already an open issue.
A number of questions are tagged with both, and there seems to be no clear distinction between the two. The descriptions for both of them are basically the same too.
I would propose that they both be merged into provisional-application. "Provisional" alone may be a little vague, as at first blush it could refer to provisional rights or something.
Finally had enough rep on the tag to add it myself ;)
Now let the democracy begin, upvote, downvote, votevote! (On the tag, see link above)