- In the online book, Collin is nearly identical in appearance to Alex Aruda. He takes up much of Rowley's significant roles, such as when Rodrick was tutoring Greg and Rowley how to play the drums, and is also Greg's backup friend.
- However, in the book series, Collin is short with curly hair and no glasses. He also has an extremely minor role, being only mentioned a few times and shown once.
- In Dog Days, Greg was banned from seeing Rowley for the rest of the summer after "burning" him. So he told Rowley to tell his parents he was going to Collin Lee's house, but secretly will be camping at the Game Hut for a Twisted Wizards tournament.
- In the online book, he was the one who got his house toilet-papered. However in the first book, Gramma's house was toilet-papered.
- His online version resembles Alex Aruda.