You would think a simple aesthetic choice, a binary question of preference, would have an easy answer. The black iPad or the white one? But it’s slightly more complicated than you might think.
The only exception—kinda—is reading books or reading straight black-text-on-white-background websites , where the white background more readily blends in with the frame of the iPad. Oh, and at least on our white iPad 2, the colour temperature screen is definitely cooler (bluer) than our original iPad or our other iPad 2. We're not sure yet if it's particular to our unit, but we're also hesitant to think that Apple is making the white iPad screens cooler to compensate for the white border. (For a moment we thought it was an optical illusion, but the cooler screen persisted after putting the white iPad in a black case.)
It's hard to really capture the feeling on camera—it's something you really should see and evaluate in person—but hopefully you're getting a sense of what we're talking about. Just know that whichever colour you choose, it's going to literally affect the way you perceive things on your iPad.