Regarding a7rii vs a7s, it seems that a7rii 4k S35 mode can rival a7s 4k quality, even in low light (with a speedbooster). However it is not clear wether a7rii 1080p s35 60 fps mode is on par with 1080p 60 fps from a7s, especially in low light? Does anybody have a clue? It is an important consideration for those who use frequently 60 fps for smooth slow motions. Is 1080p downscaled from 4k internally in a7rii, as it is supposed to be in a7s?