What fascism fundamentally does differently than pure socialism is that it leaves the running of industry etc in the hand of those more likely to have suitable skills rather than in the hands of political operators and other apparatchiks.
By definition that makes it more likely to survive as a system than the delusional true believers could manage.
But fascism is vile not for being the most moderate form of socialism but because it is a form of socialism in the first place.
Nominally. But all the major decisions are in the hand of the state.