I’m going to say something that is now fact and not fiction...something that if I said it I would have been dismissed as a pipe dream:
In February 2020, Xbox how has more 1st party studios then Sony.
It's not so much about the number of studios, it's about their output. Almost all of Sony's studios got between 200 and 400 people working for them and make huge AAA games. While MS has 3 big studios that are purely focused on Halo, Forza and Gears and the rest are mostly small teams like the Initiative with a 30'ish staff.
Xbox has more 1st party games coming out this year then PS, so I’d be inclined to agree output matters as well.
I wouldn’t be as dismissive of Playground, Obsidian and Ninja Theory. Initiative we just don’t know until e3.
But my point is that this is part of the process and very significant. With Xbox One having so few exclusives over the past 7 years, this info alone is a milestone that I’m even able to say they are at least equal in terms of studios
Xbox: Best hardware, Game Pass best value, best BC, more 1st party genres and multiplayer titles.