Mist: I find it interesting that both covers are the same except one is at night and one in the day and of course the reflection in the glasses is different. I haven't read the book so I don't know how each reflects the story but think I'm personally more drawn to the US cover, it just has a warmer feel to it what with it being daytime and sunny and even the font has a warm feel, it all makes me think of summer. I like the UK cover too, particularly the tag line and the mystery man but I think US is the winner for me.
Ninfa: The US cover seems like a fun Summer read whilst the UK cover has a darker twist with the muted colours. Just by the cover and not having read the book or taken a look at the blurb, my decision is purely based on the cover this time, and it's a UK win. I really find the tagline intriguing, and the lonely figure on the beach with the crescent moon above rather enchanting.
The US cover is fun and bright but even though it is pretty much the same cover, it feels like any other Fiction read cover out there.
So UK wins.