To me they both have good and bad points. Given the subject, the color seems too much, especially the HDR backgound, and the B&W doesn't have the feeling that I think you were tring to get.
I would have gone a bit farther in that I would have made the B&W darker and made in more of a brown tone(more chocolate) and add a touch of a lens filter or gaussian blur, just enough to soften it. I would then drag the color version onto the B&W(now brownish), making it a layer and desaturated it to take some of the color away but leave just enough. I would then paint a mask over the background to reveal the previous background. Just a suggestion