Which of these dresses is best for a wedding? are they too "look at me and not the bride?"?

The purple one is GORGEOUS!! I would buy that! And no, it won't take away from the bride at all. It's not like you are wearing a big white poofy dress! :P Lol. I would definitely go for the purple one. I think it's the flower on it that makes it that bit nicer than the other one.