In the Book
In the Movie
The Americans get along fine, they have lots of alcohol to drink as the Embassy was getting ready for a party. The TV is broken, Sheardown keeps them up to date on current events. The Sheardowns had frequent guests from other embassies who kept them up to date.
The six Americans have trouble getting along while cooped up in the Taylor home. They watch news on the TV a lot. There were no guests from other embassies.
NBC's Peter Jennings would come to visit at times. The owner of the Sheardown house would also bring in prospective buyers while the Americans hide in back rooms.
This does not happen in the book.
The Americans wrote letters to their families back home. Lee Schatz's mother told a local newspaper that her son was hiding in Iran.
This does not happen in the film.
When Mendez goes to the Canadian government to ask for official passports for the Americans, he finds out the passports are already being prepared. The Canadians refused to provide two passports for Mendez and another CIA officer.
This does not happen in the film.
Joe Calloway tells Mendez about a script he was pitched based on a novel call Lord of Light. They use the script and call the film Argo.
Mendez is sent to LA to set up a film back story. He tells Chambers that he needs to extract six Americans from Tehran. Chambers tells Mendez they need to set up an actual production company to make the film that the Americans will be involved in.