One area Bruce would seem to have an advantage over Barnes would be in-game adjustments. When Bruce's teams don't play well, it seems like it is because they got off the bus not ready to play, but he is more capable at tweaking stuff and getting back in games. In contrast, if Rick's guys don't have it any given night, then they don't have it.
They are both really good recruiters; Rick runs a much cleaner program and you don't have to worry about him as much as you do Bruce.