I prefer Black Sabbath because of their golden classics like "Paranoid" and "Sabbath Bloody Sabbath" but when he went solo, he did have Randy Rhodes and well, hes awesome! The solos in "Crazy Train" and "Mr. Crowley" were just, to say the least, phenomenal, well to me that is. Black Sabbath just has the Gods of Metal in powering them and they've made more songs that everybody loves than Ozzy has.
I agree with napolian because i liked Black Sabbath when Ozzy was in it, but not after he got fired... I guess the more i think about it Black Sabbath was much more influential for metal music which makes them more of a Legend