The controversial striker, 21, has played for both men in his short career, but when pushed to choose between them, he admitted that he prefers Mancini.
"Mourinho? Among the best. On a personal level I would say Mancini and then Mourinho," Balotelli told L'Uomo Vogue.
"A coach has to bring 100% out of a player and Mancini is brilliant at doing just that."
Balotelli has scored 21 goals in 45 appearances since joining City from Inter Milan in 2010.