Look they both don't fall far from the shit tree, but the political philosophy nerd in me still does think there's some key points of difference. And these points of difference are useful in recognising and responding to fascist ideology because it's inherently parasitic and spreads by latching itself onto other ideas. That's why you can have things like eco-fascism and atheist fascism, which don't traditionally align with conservatism. Umberto Eco actually outlines the specifics of fascism and how it's a uniquely shitty ideology that can work it's way into any dark corner of complex human societies.