Scarface, IMO, is an over the top comic book.
The Godfather, Part One, has some substance. Character development, plot, excellent direction and acting - a film with some depth - no matter the message.
I enjoyed both. Scarface is a bit of a joke. Pacino's usual overacting, lots of blood, explosions, bad accents, mindless junk. Fun if you don't feel like thinking and just want a well made, shoot-em up comic book.
The Godfather is decent cinema. Not exactly Citizen Kane, but better than average film.
Both have a place, but I don't really think they are comparable. To beat the cliché to death - apples and oranges. Similar on a superficial level - crime dramas. But one is a serious film, the other over the top, well made, junk.
