In the extended cut, opening title says "Spider-Man 2.1" instead of "Spider-Man 2".
Alfred Molina is credited as Doc Ock and Dr. Otto Octavius, but not "Dr. Octopus", the character's official comic book name.
The opening credits appear stuck on a series of webs, which display the events of the first film in comic-book art created by the legendary Alex Ross.
The closing credits are surrounded by webbing.