Answer
AC Milan has had more Ballon d'Or winners while playing for them than Inter Milan. AC Milan has had seven Ballon d'Or winners, including Gianni Rivera, Ruud Gullit, Marco van Basten, Frank Rijkaard, Andriy Shevchenko, Kaká, and Cristiano Ronaldo. Inter Milan has had three Ballon d'Or winners, including Ronaldo, Luis Suárez, and Lionel Messi.