There's a pattern, and this tends to be true in many cases, that when people are starting out in the Outfit where one lives matters and correlates to what crew they are in. After they start making money it doesn't matter as much because they move to wealthier neighborhoods.

Capezio and Accardo were both connected to the Circus Cafe and they went to Grand Avenue, but Claude Maddox was too and he went to Cicero. The Circus Cafe was also located in the North Side, so all those connected to the Circus Cafe moved away from that area. Anyway, just putting out a theory and seeing what everyone thinks about it.

Frank Rio was the bodyguard (if that's what he really was) who was arrested with Capone in Philadelphia. He was also supposedly the one who saved his life when the Moran gang machine-gunned a restaurant he was in. He was considered the top leader when Capone went to prison.