Originally posted by Guineapig:
Another difference is that: in the book; Fredo is supposed to be big and strong. Not as wimpy as he was portrayed in the movie. Also; Sonny is supposed to have: curly black hair. Carlo supposed to be slightly build, and blondish.
At Connie's wedding, Puzo describes Carlo as having "worked in the desert air while very young--heavy laborer'work. Now he had tremendous forearms and his shoulders bulged the jacket of his tux."
Re. Vincent as Lucy and Jules' son: I think Lucy's gynecological problem may have prevented pregnancy.