Whereas the edges of the iPhone 4 and 4S were silver-metallic in color whether you bought the white or black model, the iPhone 5 is a bit different in this respect. If you order the Black iPhone 5, you get slate edges (that is, they’re tinted gray/gunmetal). If you order the white iPhone 5, you get silver edges (that is, they’re the same color as on the iPhone 4 and 4s). You can see this for yourself if, via the Apple store app, you go to Products, iPhone 5, and you go on to choose the capacity and color.
Does this change which iPhone you’re going to get?