Nobody else in Iraq would have something like that- Uday was a bastard playboy who bought anything he wanted and was known for being a car aficionado. Saddam and Qusay were not. Nobody else in the Ba'ath Party likely would have been able to afford anything as nice as this Ferrari, so it was most likely his. Especially since it was found at one of the palaces (each son 'owned' at least one palace each).