People currently with white 4/4S: does white get noticeably dirty or fix colored over time?
For me not at all. My phone is as bright white as the day I bought it. I do keep a PowerSupport HD anti glare screen prot on the front, and the back is just a plain screen prot with my zebra skin over it. I use my phone naked, as well as using a case too. I mix it up alot & the color has stayed bright In addition, I've very meticulous when it comes to taking care of my phone as well.
I've heard if you use a zagg IS on the white phone it'll show yellowing over time. I've had a zagg IS on my iPad 1 for over 2-1/2yrs now and if it has yellowed I can't see it because of the black front on my iPad 1.
(just to add, it'll be a year nov 4th that I've had my 4S)
Darth Vader Black!! They both look really nice. I had a white 4S and slapped a black LifeProof on it after having a white LifeProof, and I have to say that I thought the black was a lot sleeker and sharper.