You sound exactly like people who insist that communism has never "really" been tried.

Look, if a framework for running a society and an economy is so fragile that it immediately devolves into something else, then it's worthless. It doesn't matter if you can point to all the mistakes that were made along the way - if humans can't implement it and make it work, and if there are countless examples of them trying and failing to do this, then it's broken.

Given that there is no perfectly capitalist society, and in practice, all capitalist structures degenerate into crony-capitalist structures without strong government regulations, I would say there is no difference.