I think it will be closer than X vs Pro and will come down to games and services.Moving forward I don't think there will be a noticeable power advantage. Not enough to have a fan of 1 system jump ship from there friend's list. Any power difference can be spun away anyway. Say if the Scarlett/nextbox is a tad more powerful than ps5 it can be negated by marketing pushing games and a lower price point. If MS decides nextX at a higher price with less performance again with a kinect nobody needs and wants, we know what will happen.
If Sony is arrogant enough to release much weaker specs...it will hurt PS5 if MS does the opposite at a competitive price.