Its more than just $10 though. When you purchase tickets from Disney, they add tax (not sure of the %). Undercover Tourist does not charge tax. If I remember correctly, our last time we purchased from UT, it was a savings close to $100 for the family between the discount and tax savings. Also, I believe you wouldn’t have a problem upgrading. What you receive from UT is a real ticket, that looks exactly like a ticket Disney would issue. I’ve been able to add the tickets to my resort room keys without an issue.