I think the difference is that studies have shown that people of color have worse health outcomes due to COVID than whites. As of 7 March, blacks have COVID death rate of 178 per 100k, compared to 124 for whites. Indigenous, hispanic, and pacific islander all have higher rates than whites as well. While this policy is raced-based, I don't see it as being racist. They have also prioritized groups that are at higher risk like the elderly, immuno-compromised, and health care workers. Is everybody who is black going to be worse off? No, but you make public health policy off of the masses, not the individuals.