Its hard to say who is boss, underboss, etc because in all evidence(video and audio of the Consenza Café) from Project Colisee it showed Rizzuto SR, Arcadi, Renda and Sollecito all splitting their earnings 5 ways(1 for Vito) as if they all had equal stature although it is widely thought that the Rizzutos were the head of the table. Why would they split 5 ways equally if they had the traditional structure. Rizzuto was on wire tap in the early 90's saying they have 20 something made guys and all of equal stature with no boss. So that being said I don't have the answer and its very hard to give an answer unless you are directly directly involved.