The coke/pepsi analogy is appropriate. The issue of course is that 'capitalist democracy' is an oxymoron. Those with money run the show, and always have. In an election, you are never voting to remove the reins of power from the elite, you are instead voting for a figurehead, a public face, that's all. Nothing changes behind the scenes.

The difference is that Trump is vastly more confrontational. He creates and establishes support though the classic Orwellian 'us and them' approach. Just as capitalism is a process rather than an end state, so is this opposition-building. It can't continue indefinitely; eventually it reaches breaking-point. Biden's "I'm not Trump!" candidacy can be viewed as the establishment attempting to return to the pre-Trumpian status quo. 'Us and them' is tried and tested, but the idea is for it to be carefully targeted outwards, not turned on the establishment itself. Trump is a destabilising influence, a threat... he's more than an obnoxious front-end (yes, that is a phallic metaphor).

The masses vote for tyranny because it is what they are taught to want. Democracy is viewed by many as simply a right, when it should also be viewed as a responsibility. Is true democracy possible or even desirable, if opinions can be corrupted and managed so easily?