We really won't know for a long time yet.
Which mid-gen console sold more total units? Which console had the most unique new users as opposed to upgrading users? Did either console significantly affect brand market share outside of the launch period?
Personally, I think Microsoft might have had the better idea of differentiating their premium console with more power and a higher price tag in order to draw in the people who look for that kind of thing. With the PS Pro, I think those kinds of enthusiasts and rich kids were often fine with the base model. Of course, some of that has to do with the original Xbox One being well behind the original PS4 in real world results.
However, I think Microsoft waited too long. Sony had the better release point.
