Interesting question. Without the Italian model, the existing German fascist-oid organizations would emerge as a more directly obvious influence. The Hungarian far-right would also probably be looked up to some extent.
Interestingly the Young Turks, or more specifically the Ittihad regime in the Ottoman Empire, were cited by several Nazi ideologues as an inspiration: perhaps in this TL, the Nazis would try to study the Turkish example more closely instead of just paying lip service to it according to the vague information they had available.
Certain things would be different, but some kind of highly violent authoritarian counter to the possibility of socialist revolution would definitely arise. It would be coupled with revanchism in countries who feel that they are entitled to more than they got in the post-1918 order, and with potentially genocidal ideas arising from the general radicalization, endemic racism towards Jews and Slavs, and the increasingly "colonial" approach to various questions. And it would find natural allies and inspirations in the existing far-right paramilitaries, officers' societies and conspiratorial groups such as the Aufbau. Who - while they weren't completely sure what they wanted - definitely had all the basics nailed down even before the rise of Italian fascism.
("The basics" meaning the overthrow of the Versailles treaty and the return to an idealized time when Germany was strong, the military was respected, people did not try to alter their place in society and communism was a harmless theory discussed in coffee houses. Oh yeah, and you know who's to blame for destroying that? Obviously the Jews. Duh.)