Well there are tons of features photopost has over vbgallery. vbgallery can only obtain this functionality right now through 3rd party hacks on some of the following things.
1. Multimedia Played Inline
2. Photo Blocks on the Forum
3. Categories List on the Forum
4. Gallery Specific Moderator assignments to moderate comments and photos
5. Upload to Optional Additional Categories on upload showing picture across multiple categories.
There are tons more options Photopost has by default over vBgallery since it is only an addon here is a thread on PhotoPost Features and there are more to come as that thread still needs to be updated at the last 9 months new feature additions.
Comprehensive Review of PhotoPost Options