Let me be clear about what the difference is: the way that Democrats and Clinton behaved in 2016 was legal and constitutionally within their rights. The way Republicans and Trump behaved in 2020 was not only illegal, it was seditious bordering on treasonous. Putting those two reactions into the same bucket in any capacity is an act of historical whitewashing and indeed, false equivalence.
Seems to me like you’re very clearly making an equivalence right there.
One party responded within the bounds of the law and exercised their rights, whereas the other broke the law and tried to overthrow democracy, yet you equate these two responses as “not accepting results”. This is very clearly a false equivalence. If these two responses are equivalent in your mind under the umbrella of election denial, it would seem to mean that no American has ever accepted an election, because one side is always sore about the outcome. You’ve effectively rendered the term election denial meaningless (which is the reason false equivalence is a logical fallacy), so what exactly is your point then?