in the shows I saw the best vocal peformance was given by Richie.... however I don't think it was down to ability, just drive, passion e.t.c...

Jon could still be a better vocalist, just doesn't put as much into it as Richie does.... At least that's what my two shows were like, I know from past experiances that Jon can and still does sometimes really go for it, unfortunatly he doesn't do it every time he's on stage like Richie seems to