they are 2 different animals. pixel qi in not e-ink. still hurts on the eye... e-ink is like ink.
but edge is pretty bulky and not very stylish I will say, it is fine for academic word. still a lot of improvements. for beach reading is nook for sure. we had 2 edges sold one and got 2 nooks instead. my wife is very happy with the nook, i will buy an adam. for me will be adam and nook most of the time, sometimes the edge. my wife is nook and edge for most of the times. everybody will be happy.