Those do not mean the same thing, Trump losing doesn't equal Biden getting them, people could just not vote as well. In any case, the "idea" of Trump is better than trump himself, people like the idea of him, but when he starts to talk, people get cold feet about it. So, if Trump wants to really win this, I highly suggest he doesn't campaign, and I mean it, if he doesn't campaign at all, he has a very high chance of winning the race without a doubt.
I have seen Republican voters saying Biden is both a senile person who does not even know where he is and at the same time he is the godfather of a the Biden crime family, a small syndicate of criminals worth millions and millions of dollars. He cannot be both at the same time, obviously.
In my personal opinion, Biden is still a capable person but he also needs help when comes to taking decisions and governing, there is where the Democrat party come to his support and defend him. It would be easier if Biden was younger and did not need much assistance, since it has been already proven he indeed gets assistance for his political events.
In a normal country, Trump would not be the Republican nominee, by the way, but these are extra ordinary times.