I'm pretty sure that booted bantams are a breed. Some D'Uccle websites give descriptions of both breeds... so you can compare. He has wattles which d'uccles shouldn't have whether they have a beard or not. Mine do not have beards but they don't have wattles either.
He is a d'Uccle but I'm not sure if he is porcelain I have two and this is what they look like, maybe its just the picture. then again I don't know much about this breed. He sure is handsome!