i have both and i must say its a very tough choice.. During the day the blue one looks like the best thing you'll see, no seriously its amazing!) however in low light(very low light, where you can only just see the blue) conditions it doesn't look that good, the black looks amazing in the dark though bearing in mind the clear black amoled also it feels a bit more premium than the cyan but thats only my opinion.. Anyway for how amazing the cyan looks like during the day i'd choose cyan any day!