It was a class struggle between the eupatrids who monopolized political power before democracy was introduced and the unprivileged citizens who had it after. And it did make a difference. If it did not, why did you even mention it on your list? And that same class struggle went on throughout the Greek world during that period, from polis to polis, sometimes the democrats winning, sometimes the oligarchs coming back and putting them down, sometimes the democrats finding that they had only replaced the oligarchs with a tyrant – and sometimes regretting that, sometimes not. One can hardly understand Classical Greek history at all without class struggle.