Even though I'll never vote for either of these genocidal neoliberal freaks, they are not the same. Saying one is bad because he is old is not an acceptable justification and it is ageism. The problem with Biden (regardless of his and his party's political orientation) is the fact that he is simply unsuitable for the job, he clearly doesn't have the mental and physical capacity for it. Trump on the other side (even though he's a fascist and regardless of the insane shit he says) is fine. He has the strength and mental clarity for the job. So don't compare Trump and Biden on this front, Trump can function just fine.