J.W.
I work in a doctor's billing office, none of them are easy to work with. :(
Have him ask his coworkers, that is really the only way to know. I am in St Louis, here all three of them are equal, actually Blue is a NY thing, my point is there is no difference here, there could be a difference there.
So I guess if you start getting answers you may want to ignore any of them that are out of state! I have a friend in NYC who had an issue with her insurance and my coworkers helped her. These women could work with insurance companies in their sleep, they had a hard time helping her. You step across state lines it may look the same, they may call it the same but I assure you it is a different animal you are looking at.