I read Eco's Eternal Fascism and used it for this: https://extranewsfeed.com/is-the-trump-movie-a-fascist-rerun-5fc3247f9402 . Italians like to emphasize the differences between their fascism and the Germans' racialized copy. But that whitewashes the atrocities committed by Italian fascism in Greece, Yugoslavia, Libya and Albania. This will give you a truer picture of the dimmer daylight between Italian fascism and the Nazi iteration: https://medium.com/lessons-from-history/world-war-ii-mythology-tour-8b44c9cf0f13

I like the Italian refugee from fascism, Gino Germani's thesis about the functional substitutes for fascism explaining Pinochet, Videla-Galtieri, El Salvador, Guatemala (Rios Montt),, Franco in Spain, Castelo-Branco in Brazil, etc: https://www.jstor.org/stable/23261732?seq=1 . The Nazi variant was the most revolutionary, Italian fascism in the middle and Franco the most conservative authoritarian in this spectrum.