I was thinking of getting a white 4S at the Apple store on Sunday. I decided against it after I saw all the demo phones in the store. They were "dingy", yellowish color. They certainly were not white. Not the bright clean white you see out of the box. Yes I know thousands of hands have touched them but that's the point. How long does the white, stay white? Surely it has to fade over time. All white does. Especially in electronics.
I think both phones look good. I prefer the black though. I like the sleekness of it and I like how the screen just melts away against the black border.