Black is iPad 2, White iPad 3.
When I first compared, I thought my screen was for sure "yellow-ish". But I've come to see that it's really not that bad. It is on the warm side, but the iPad 2 is also very cool. I did a few different test with bright and dark movies & photographs and the iPad 3 is definitely more accurate with flesh tones and colors. The ipad 2 however, is more accurate with bright whites. All in all, the ipad3 has a more accurate, better picture. But the Whites are definitely more accurate on the iPad 2. No doubt.