Well we are certainly not up at 5:52am
Okay vBGallery is a sleek gallery integrated with vbulletin. It does not have all the features of PhotoPost however it is essentially an addon to Vbulletin and will not work without it. The admin panel is in vbulletin admin and the templates phrases etc are all in vb
Photopost integrates with VB
as well with login and css however the admin section is separate meaning photopost has its own admin. We use alot of the same integration features as VBGallery for look and feel but PhotoPost is a much more mature program and loads more features.
Basically you just need to decide which one is right for you. Here is a PhotoPost integrated with Vbulletin http://www.reeftalk.com/gallery