Probably because a careful examination of his photos (yes plural) appears to show two separate photos cut and pasted to look as though they were taking as one photo of the two devices sitting side by side. Look at the lower right of the composite photo which shows a strange edge of black. I can take photos all day long of eInk screens and no two come out the same. They are notoriously famous for being difficult to photograph. However, in my photos, I placed the devices either on top of one another or side by side to use the same lighting in one photograph to more accurately display the differences.