Just one example is that communism allows for almost zero private property whereas the Nazis and other Fascists allowed plenty.
Yes, they allowed private property but regulated almost every aspect of that property and rigged it so NAZI party members were advantaged in any business dealing.
Marxism is no private property....even the ranking apparatchik’s dachas were not theirs.
I confess to being old school...right wing extreme on one end can develop into authoritarianism
and leftism on the other does rather than can...lead to totalitarianism
yes they are similar but also distinct....as in a fascist is not an anarchist
I was taught a number of political models in the 70s, I can't say I find the circular model inspiring...nor the axis models either
myself...I am a right wing nationalist with a strong rightist cultural bent...so I would naturally be more inclined to say a monarchy if it had to be rather than a collectivist utopia..hence..it's a linear progression in both directions for me...pulling away from one another in goals but perhaps sharing method on occasion.