Dear Syag,
Different treatments will give a new result for the virus to play out in. That should take away an average of the other cases. It should not redefine the numbers. For example, if a medicine would prevent blood clotting and stop half the strokes in Covid patients, we should not see less patients being sick or less patients dying from pneumonia like symptoms. It is worth noting, that NY was not the only state with this policy, and it did not have the worst result. [That was NJ. Double Ny’s death rate.] And it is two months later, and the proof that this was bad policy is not (yet) glaring at us.
The difference in masks and social distancing would play out that we do not see a surge of cases. But the cases that we do see should be somewhat similar in every data set. Of course there will be differences, and they will be heavily analyzed. Then we find disparities that exist within the virus- much like code in a computer program. We should not find, that the virus in one state affects the young and spares the elderly,