All white people are different from all black people in the same way?

They can be told apart like this, absent skin colour?

It is more obvious with some and a bit more nuanced with others, but in general yes. Just like you can typically see the flat/wide nose in Africans and Asians but not Europeans. Again, there is no implication of one being "better" than the other here, but don't pretend it's impossible to categorize people like this.