The BA’s won’t have the sensing thing as completely as the BL’s. Their little knacks come from the curse Celeste put over them (a little bonus for losing their size, something to increase their survival chances). BA Dean might be a little jealous that his tiny counterpart can track down pretty much anything if he figures out that he needs it.
The BA bros teamwork won’t be as seamless as the BL bros because they spent half of their lives separated while the BL bros have never been apart. The BL bros are also a lot more dependent on each other because of this, and stress more if they need to separate for long periods of time. Jacob will notice this if he only has one brother around.
XD BL Sam certainly has keeping Dean in line a lot easier than BA Sam. He can haul Dean around all he wants while BA Sam has to figure out how to keep his giant of a brother calm (or rile him up more).
They have their Deans cheat codes.
Brothers Apart 