Both are gods, and I'm not just saying this because he's dead, but Ronnie James Dio. He just had an overall better voice than Bruce. Bruce's voice gets kind of annoying some times if you know what I mean, and Dio also accomplished more than Bruce will likely ever have. Bruce has been in a metal band, Dio's been in rock n roll bands in the 50s, a classic rock band with Ritchie Blackmore, the band that created heavy metal, and his own heavy metal band. For me the choice was quite obvious.