Fascism vs Socialism
The only robust distinction I've ever been able to find between Fascism and Socialism is that if they're honest or explicit about their power&social structure then they're fascist, if they're dishonest or implicit then they're socialist.
Otherwise, both are identical : necessarily totalitarian states with the power restricted wholly to an elite/cadre.
Socialism could _theoretically_ exist in the form that the ingenuous insist it always _must_, but only so long as critical preconditions exist. These include: modification of human DNA and/or cloning, in order to achieve an absolute homogeneity of citizens and of a wholly selfless nature and precisely zero inclination among anyone towards parasitism or even social loafing: costless teleportation of resources ; and long-range telepathy to enable immediate, whole-of-country, and frictionless adjustment and coordination of resourcing.
In the absence of at least these preconditions, socialism and fascism differ only in their public honesty.