I ask because I have Windows binaries of both and my phone (Blackberry Priv) is only recognized by the one from the 6.0 branch. So I can't use my phone with my Pi because the only adb binaries I can find for Pi are from the 5.1 branch.
I even found a download/build script at https://github.com/bonnyfone/adb-arm and was able to build adb myself from the latest 5.1.1 r36 but it still doesn't see my Priv.
I hoped I could just adapt that build script to do the 6.0 branch, but it looks like they switched from C to C++ so it's totally different and I'm way over my head on figuring out how to create my own make files for this. Any help would be appreciated