Ozzy Ozbourne and Ronnie James Dio are both vocalists and song writers who have been part of the English rock band Black Sabbath.
Comparison chart
 | Ozzy Ozbourne | Ronnie James Dio |
|---|---|---|
 |  | |
| Associated acts | Black Sabbath, Kelly Osbourne | Elf, Rainbow, Black Sabbath, Dio, Heaven and Hell |
| Website | Ozzy.com | http://www.ronniejamesdio.com/ |
| Introduction (from Wikipedia) | John Michael "Ozzy" Osbourne (born 3 December 1948) is an English singer-songwriter, whose career has now spanned four decades. Osbourne rose to prominence as lead vocalist of pioneering English heavy metal band Black Sabbath, and eventually achieved | Ronnie James Dio (born Ronald James Padavona on July 10, 1942 in Portsmouth, New Hampshire, USA), is an American heavy metal vocalist and songwriter who has performed with Elf, Rainbow, Black Sabbath, and his own band Dio. Other musical projects incl |
| Birth name | John Michael Osbourne | Ronald James Padavona |
| Born | 3 December 1948 (1948-12-03) (age 60), Aston, Birmingham, West Midlands, England | July 10, 1942 (1942-07-10) (age 66) Portsmouth, New Hampshire, USA |
| Genre(s) | Heavy metal | Heavy metal, hard rock |
| Occupation(s) | Musician, songwriter | Musician, singer-songwriter |
| Instrument(s) | Vocals, harmonica, synthesizer | Vocals, bass, keyboards, trumpet |
| Years active | 1968–1992, 1995–present | 1957 - 2010 |
Comments: Ozzy Ozbourne vs Ronnie James Dio