I have never quite understood how a wax is specifically formulated for Italian or Japanese cars. In theory I guess its a good idea, but I cant see that the paint/clearcoat composition will differ that radically that it will require a specific wax, I mean there are just not that many different OEM automotive paint manufacturers/suppliers. Unless its radically different from the norm ( like Mercedes ceramiclear ) then it just kinda baffles me how they tailor it to the "nationality" of the car?!?
But to answer the question, I personally wouldnt go out to buy a jar of "Italian" wax just specifically cos its an Italian made car. Just use a good quality wax that you already have and have had good experience with. You dont really wanna be "experimenting" on a Maserati. I know its only wax, but Id be more comfortable in sticking with what I know........