If we talking about music achievements, accomplishments and sales it's Eminem but if we talking about lyricism, impact, influence and skills it’s still Eminem
Kendrick references prince a lot which is crazy cus prince & Mike had a lil rivalry where prince was seen as the secluded one who would drop amazing projects & go back to his world and MJ was the star with all the hits. So the “prince outlived Mike Jack” bar is interesting to me