It’s no different than asking if a person is “British - English”, “British - Scottish” or “British - Other”. Before the mid-1800s Italy was divided into several countries, the “Kingdom of the Two Sicilies” being one of them.
It is different... the boundaries for England, Wales and Scotland still exist on the map, and they do have separate assemblies.
My mother is from Trieste and she thought all of the rest of the Italians from Rome south were “lower class and lazy”...:^)