I simply stated you where posting about a totally different product and you could find what you want in a very specific mod forum.
Pro is not a lesser product nor is vbGallery they are totally different products. I can not say why you would be confused there is a wealth of information about the products right on our site under the details tab. PhotoPost PHP Photo Sharing Gallery - Product Details
There is a specific section which talks about Pro and vbGallery and has a complete comparison PhotoPost PHP Photo Sharing Photo Gallery: Pro vs. vBGallery
Your talking about actual plugins to vbulletin not so much core gallery features and code. vbGallery may have some forum plugins by default included because vbGallery is a vb
addon only whereas Pro is a much more robust product.
Both gallery code is going to display in your gallery directory not the forum. Anything that displays outside your gallery I refer to as a forum plugin. You can achieve what you want by using the mod that I referred to to add functionality to your forum.