I have in front of me two iPad 4 tablets, both with evenly tinted screens but a marked difference in screen tone. One is definitely on the more clinical side of white (cool) while the other is warmer (i would not say yellow). Normally I would have liked to try both for an extended period but I have to decide and return one by friday. I normally use the iPad only for reading....web articles, magazines,books and surfing. Does anyone have any preference regarding warm vs. cool screens specifically for reading? Both look nice to me but I was wondering if (in the long term), the warmer screen would be easier on the eyes. Thoughts?