I have the classic 1 cup Bialetti Moka Express since some years and make a Mokka from time to time, just for fun, on my E-stove. I just love this purist stuff!! But I never tested these others, made from zinc di-cast. But there was always the old discussion, if the Mokka tastes of the metal/aluminium. All I can say, is, that the Mokka tastes def. like Amaretto or "coffee with shot", so really italian. I got no real Espresso machine and can't compare. But if anyone of you got an Espresso machine or even both, could you give an impression, if the taste is really "metallic" or not?