After just 2 days with the A7s, I notice a few differences between this and the megapixel A7r (dated).
With the same lens (tele to avoid vignetting related issues), the 7s is "brighter" - requires lesser exposure times.
Also, the magnified images (center) are sharper.
All this before clicking to take a shot. Of course, the EFCS (quieter than the A7) or the Silent shutter of the 7s is something else.
Could anyone who has the 7s and the 7r please check if what I am seeing is correct or am I imagining things? TIA!