man, how can u not tell the difference between Zakk and Rhandy lol, the big difference is that Zakk beleive it or not is a better guitar player than rhandy and there whole style is different Rhoads was more classical and Zakk is more blues based/heavy metal

and ozzy had 4 guitarists in his solo career,
Rhandy Rhoads, Jake E. Lee, ZAkk Wylde and Joe Holmes
now theres a fu#kin Guitarists Joe Holmes by far the fastests guitarist anybody will ever hear Joe was actually taought by rhandy rhoads and is now and has been attending the Rhandy Rhoads School of Guitar his style is kinda like Zakks but his own in a way