"base item and projected item are equippable by the same class or job"

[Shuon]

what about equipments that are equippable by more than 1 class?

specifically, if i cast the mirage of pld af on the DL and subsequently proceeds to equip the same piece(s) on my war, what happens? or will i not be able to project the mirage in the first place because it failed the requirement above?