Balotelli hit a spectacular goal in Italy's 2-2 draw with Brazil.
"Who between Neymar and Balotelli is more prepared to become a star of the World Cup? In my view, Mario is more ready than the Brazilian," said Italy teammate Barzagli.
"Neymar is very strong, but just needs some European experience to become one of the best. Mario is proving right now that he is ready for the big stage and will be a protagonist of the 2014 World Cup."