Oh you bastard! Love them both, but have to go with Speak of the Devil. Nothing wrong with Dio of course, but I just like the way Ozzy sounds when it comes to Sabbath songs over Dio. I like Dio's singing much better, and his Sabbath songs are all great, but him singin Ozzy's stuff just never sounded right to me. Plus, Speak of the Devil was sort of my go to album back in the day. Probably listened to that more than any other live album. Still a hard choice, and I hate you for making me make it lol