What´s the difference between StatPress TopPosts & BFA Popular Posts?

I don't know StatPress TopPosts. The two BFA widgets list the posts with the most comments. One overall, the other one (BFA Popular in Cat) based on posts in the given category. The "BFA popular posts" widget can be turned on/off based on page type, via check boxes. You can, for instance, show it on the home page and single post pages, but not on category pages and author pages, etc.