The guy who created "American Idol" wrote a letter to his AI staff announcing Simon Cowell's departure from the show -- but in between compliments, Simon Fuller slipped in an ego shot at his number one judge.

In the letter, distributed on the same day Cowell made his big announcement, Fuller congratulated Simon for moving on to his new show "The X Factor" -- but reminded everyone that it will be "in the same vein as 'Idol.'"
Translation -- he's knockin' us off.
In the end, it really doesn't matter -- they're all making wayyyyyyyyyyyy too much money to care.












