Arancini and Supplì are, in essence, very similar as they are both made with tasty and creamy starchy rice (arborio or carnaroli), flavored in many different ways. However, they are different in shape and, most importantly, history. Arancini are made in Sicily, and they most probably come from the Arab influence on the island. Supplì is a Roman dish that has always been made with leftover risotto, and it's often filled with melty mozzarella cheese. Nowadays, both Arancini and Supplì have become an integral part of Italian Street Food Culture and are cooked with many different flavors and fillings.