yes, there is a difference.
One publisher publishes on multiple devices, so even after years the devices are no longer in production you can still play the game (=> PC) and the other makes only exclusives (with a few exceptions in the current year).
You can also see it this way, Sony buys a studio after the studio itself has successfully implemented new IPs on the market at their own risk. And when they are successful enough and get money problems (because the projects are to big (like AAA titles tend to) to lift it themselves, they buy the studio at a cheap price.
Same result, different view