I'm thinking about getting guitar pro but I see there's some tabs labeled "tab pro". Are they the same thing? If I get guitar pro will I also have access to the tab pro ones?

Use tuxguitar instead, its free and opens guitar pro and power tab files.

As far as i know, all of the "tab pro" tabs are just the guitar pro tab files that users had already uploaded just running in your browser through UG's service.

Using tuxguitar gives you the flexability of using any tab you want and lets you save the files on your pc like guitar pro so you dont have to search it every time.