I checked the bin files quickly for some ASCII data, but since I didn't find anything I have not touched it since. However, I have an idea. We would need to load all .bin files we want to compare (let's suppose, DFL's Bundesliga, R8cha MLS, a friend of mine's Brazilian 2nd division etc). The app would then search for the same instance of each player's ID number, and if there are any conflicts, generate a list.
I have tried to import a different set of South American teams with DFL's files and everything turned out to be a mess. Having a tool that allows to see which players will be moved around when loading a .bin file would be extremely useful.
Do you mind sharing the brazilian 2nd division teams?