I've noticed my EDGE Nexus screen is hotter than my just delivered 3G ATT Nexus. Side by side, the 3G is quite a bit "cooler"(on the blue side). It's a good thing and a bad thing. IMO, my homescreen and live wallpapers look better on the EDGE(hotter) Nexus, while my videos look better on the cooler 3G since the red push is now gone. Seinfeld always looked like he was wearing lipstick but not on the 3G. There is definitely some variations in Nexus screens tho.