They're not. The S is intended and marketed as a lower res machine. There's no point in 4k, and forcing 4k on series S isn't the right thing to do. The right thing to do in that kind of patch is to remove the frame cap.The biggest selling point of series S is that Microsoft ensured us that it will deliver the exact same frame rate as series X, just at 1080p rather than 4k. Are Microsoft fibbing?