I have both a black and a white 16gb iphone 4. Im noticing quite a few differences. the wifi on the white one is DEF a lot better... It constantly receives data in at around 20mb/s where the black one only gets around 6/7 mb/s Also, when opening and closing the same app on both phones, with no multi tasking going on, the white opens and closes the apps a lot faster? Discuss.