On a fundamental level, MS isn't a media company. They have never created anything unique nor do they know how. They are fundamentally not a creative company, from day 1 of the company's founding, they were either copying or licensing someone else's creation. This is true of the original MS-DOS all the way to today's MS products.
Sony started out as a consumer electronics company but were famous for creating many innovative and iconic products. The first portable music player can be attributed to Sony, as the original Walkman. This invention revolutionized how people consume music, and the today commonplace idea of listening to your headphones instead of blasting music for everyone to hear can be directly traced back to the Walkman. They were instrumental in developing the original CD as well as all the other important physical media format. They also acquired movie and TV studios, and managed them reasonably well over the decades while gaining competence in mass media creation, and of course eventually launched the first Playstation and then spent decades learning how to create the mass media known as video games.
On a fundamental level, Sony has gained competence at creative disciplines and media production, something that MS has never done because quite frankly MS never needed to. MS is primarily a company which maintains several critical monopoly products which are essential for the world's computers functioning. There's no need to invent, create, or innovate when it comes to things like Windows, Office, and Azure. Just keep doing the same thing they have been doing for decades and keep the money spigots well maintained. This is anathema to something like video games where you must constantly be inventing, creating, and innovating to bring new experiences to gamers who are media consumers.