The answer to the question is "older". Proof, whose real name was DeShaun Dupree Holton, was born on August 2, 1973, and died on April 11, 2006. Eminem, whose real name is Marshall Mathers III, was born on October 17, 1972. Therefore, Proof was older than Eminem by one year.
Rhyme and Reason: Testing Your Knowledge on Proof (1973-2006)