The difference between the Uruguayans and the Donner Party is that members of the Donner Party apparently killed and ate their fellows, while the Uruguayans only ate those who died as a result of the plane crash. The Donner Party lore was written up in lurid 19th Century fashion as a scandal, while the story in "Alive!" was written matter-of-factly, with the question "put yourselves in our shoes, what would YOU do?"