Maybe is the different development kits.
They made an increase in power between version 3 and version 4, taking into account the comments from the developers. It is possible that some are still working on an earlier version that can generate below PS3 level graphics when the screen in the controller is used to display a lot in 480p and the bigger developers have a new version that solved that problem or are not using the screen a lot and can use more of the power of the console in the images being displayed only on the TV.












