I love finding these. It's so awesomely intriguing to see how see how different a picture can come out. Here, I think the huge factor here is the coloring. The color contrast between the two is literally like hot and cold. But I think it's also interesting to see how the photo is manipulated for different means: see how the girl's hair shape is different on the right when she's on the Darkness Falls cover so you can see the backdrop they've included? Or how there's some magical swirly stuff going on behind the title of A Want So Wicked?
I'm totally entranced by these covers. What do you think?