It's a lot easier to find a black vibe than this shade of orange, so if you like the orange, that's the one to get. (I'd like the back better if the handle weren't white!)
I like to have a lot of different colors because that pleases my eye when I look at my collection. If I could, I'd have every one of my toys in a different color. Alas, so many are only available in pink or lavender, but I do my best to mix it up.