I wonder if this is where the Nunziata confusion came from:
Definitely a different Capone.
<removed the Ancestry one - definitely a 3rd different one too>
Definitely need to clean up the references if this originally started off as the Italian Vincenzo Capone and morphed into Al Capone's brother. I also note that Wikipedia shows him as James Vincenzo, and we have him as Vincenzo James. The wrong one is Vincenzo James, which leads me to believe that someone was originally trying to make him into the Italian one and we've sort of co-opted him.