We're talking about different conditions here, and I think you can look at Obama's ferguson response combined with Biden's race record to predict how he's going to treat the protests, especially considering that his opposition will be the Republican party, i.e. there will be no mainstream criticism of him for being too heavy handed.

Honestly, though, I'd break with the consensus here to say that there is a meaningful difference between a President Biden and a President Trump, but I'm still voting Green because voting for Biden means perpetuating the system that gives us "choices" like this in the first place. We've reached a point where it's either the system goes or the system stays, and the latter wil have disastrous consequences.