I would imagine the ease of sharing, searching, following, comments/discussion, pull requests, etc. I don't have any experience with Bitbucket yet other than m

I would imagine the ease of sharing, searching, following, comments/discussion, pull requests, etc. I don't have any experience with Bitbucket yet other than making an account and poking around with the interface, so I don't really have a frame of reference, but GitHub does seem to do the above things quite well in my relatively limited experience.