He's incredibly jelous because he's reminded as the guy who brought juve to its darkest point in history, and Marotta was the white light that took the club and brought it back completely at the top despite the state of serie a and is considered an absolute legendary manager that overshadows Moggi's accomplishments.
If Juventus win the CL, and Moggi absolutely fears this, there is nothing, and in tell you NOTHING, that he can say he has over Marotta.
Lets look where juve was before Marotta and see where it is now. Compare to serie a and clubs in general. Its unprecedented.
Marotta should get a monument. Cartoonesque. A devine beeing that lifts juventus into the light while under the item that represents juventus, is moggi pulling it down but failing.