Originally Posted by
dimab
I wouldn't worry about aluminum: the metal itself is quickly (even before the first use) covered by aluminum oxide, which unlike the rust on iron doesn't "eat" into the metal but stays only on the surface and acts as a protective layer. It doesn't come off into the food. Moreover, as any Moka lover knows, you don't wash off the oily coffee residue from the inside of your pot, and this is an additional layer of protection. On the other hand, aluminum is a better heat conductor - so the aluminum pot should be better for coffee preparation.
The bottom line: the entire nation of Italy can't be wrong :) Use the aluminum one, and just don't rub it too hard when washing.