My brother is thinking about buying a model S, however, we're both a bit confused. We've been looking a post-facelift CPOs and under the 'features' of some, it says 'All Glass Panoramic Roof' but on other CPOs it says 'sunroof'. I initially thought that the pano roof was essentially a immovable all glass roof and sunroof was a movable glass roof but after searching the differences between the two on youtube and google, I feel as though they're one thing: all glass roof that's movable. However, that doesn't seem right as Tesla lists them differently under their 'feature' section. Can someone help me out on this? Thanks!