They are both indirectly not in support of bitcoin. Even if Trump is speaking positively about bitcoin now, that does not mean that he has good intentions for the technology; it's all about standing with something that can help his political agenda. That's all I see here.
A politician can promise to make everybody rich if he is elected. The problem is that you cannot hold them responsible for the promise they made doing politicking. They will give you many reasons why they might not fulfill the election promises. Both Trump and Biden have nothing to lose if they decide not to fulfill their campaign promises since both of them might never seek re-election if they win or lose.
So if you are casting your vote, it should be based on what you think the person can be able to do to help the country achieve more height and the citizen be more comfortable, not what they promised to do for bitcoin, which I doubt they will even keep their word once they achieve that political office.
There are so many issues that voters should consider besides favorable Bitcoin laws. What is the candidate's plan for the economy, immigration, foreign policies, military spending, etc is also important. Crypto-friendly Americans shouldn't consider just Trump's crypto manifesto.
Governments hate privacy and anonymity, so anyone standing and representing a government office, especially that of the US, can hardly stand fully with Bitcoin.
No politician or government will ever support decentralization. They will always want to monitor and control the financial dealings of their citizens.