I think that the manner of making pizza is neapolitan manner (high crust, flour) , whilst pizza napoli is (here) weel-known with anchovies. Here in Milano and in the north is very easy to find pizza with low crust. In Roma is famous the "pizza al taglio" squared and high.
Sicilian style here doesn't exist (made with a little semolina's flour), except for seasoning: caciocavallo (the real sicilian pizza eaten in Sicily includeds caciocavallo cheese, but very often you find mozzarella), anchovies, capers (from pantelleria),black olives (maybe onions, I'm not sure). But the most famous type of sicilian pizza is called Sfincione (from Palermo)...I think you know this type of sicilian pizza...