The wow effect of DK1 is lowered in DK2 because of the edges of the screen now more noticeable. The drop doesn't seem to be big in numbers, 111 to 106 or so, but it's noticeable especially looking straight, as if you were in a box or used a badly constructed diving mask.
That makes me wonder what would happen if I stuck a piece of metallic tape on the side plastic, mirroring the screen edges so that the light doesn't go abruptly black at the edges ...