[soulfuldog]

Apart from the weird grey band at the top of the screen, the one on the left looks a lot nicer screen to me. The one on the right looks a bit blotchy, mainly from the shadows at the bottom, but also some colour on it too (I don't see it as noticeably as xendua but I don't think I'm that colour sensitive). On the plus side, the text looks a bit darker on it than the one on the left.

If the shadows are still there when you have the light at the level you read at in the dark, then I'd go for a replacement. If you only notice it because you've put the light up high for the photos, and don't really see any colour on there, is it really worth returning it? Although not perfect, it's far from being a poor screen, at least IMHO! It's what you think that counts, you're the one who is going to be reading on it.