I don't have any experience with Tower, other than having heard the name. From their feature description, I can say that Fork does not have multi-user or team management functionality, if that's important for your use case.

I'd recommend giving it a trial run. For me it ticks all boxes for personal and professional use, I'm very happy with it. The managing of a large number of repos could be better, but I do OK with a single "hub" folder to keep all repos, with nested folders and symlinks.