I don't know about white vs. black, but I'd say that there's more of a variety with the white phones due to the way I perceive the colors. I've noticed a relative shift in cool/warm tones with my white phone.
Under soft indoor bulb light, my phone looks like it's more of an eggshell/off-white and my display appears to be very cool in relation.
However, under sunlight or bright white light, the phone itself looks ultra white and the display appears to be warm.
I dig it!![]()
IMHO, this screen temperature "issue" is getting way overblown. It's only visible when you have another phone to compare it to, and barely different even then.
I didn't need to compare to see the problem. I noticed my dirty, yellow screen and washed out colors as soon as I pulled up the settings screen for the first time. Originally I thought it was the cheap screen protector I'd put on and got a new one and then realized it was my screen. That's when I compared to a 4 and fully understood the extent of the dirty, yellow tint.
And I've had mine for four weeks now and nothing has changed. The screen hasn't cooled down unfortunately. I've just been waiting for the battery issue to be resolved before I take it in.