The image quality of the Oculus Rift is indeed not that much better than the quality of a good smartphone (S6 or S7) and Samsungs GearVR. But the experience with the oculus rift is still much more immersive. Maybe it´s the incredible smooth headtracking or the unusual and clear lenses, but with the Oculus Rift you feel much, much more transported to the VR-world. The overall quality of the Oculus Rift is in my opinion way better than the Vive. But I really doubt, that the price of either of one is worth using it for krpano only. Except if you´re making your living from panorama photography, than it´s maybe something that could impress your clients enough to choose you