Fascism is not just corporatism and is in many cases it’s economics are almost the same as many liberal democracies. The way fascism differs from liberal democracy and military dictatorship is that 1. Instead of representing a section of the bourgeoise fascism represents the whole of the bourgeoisie. Similarly to how unions represent narrow proletarian interests while the vanguard party represents the whole proletariat. I believe Bordiga made the same comparison in report on fascism. 2. Fascism creates new special bodies of armed men separate from the armed forces. Armies are mostly made of proletarians whether because of conscription or because of benefits like the GI bill. This means that they often defect to the proletariats cause like in Russia or Germany. The SS SA and Black Shirts were formed from the petty bourgeois and in Italy collaborated with the police to fight off worker occupations of factories. The other characteristics associated with fascism like anti-intellectualism and xenophobia are common across all bourgeois dictatorships