I definitely like the first one better. the second one is nice as well and may offer more layering opportunities but the first one to me says elegant, classy and frankly, a little different. I read a really good article last year in Vogue by Plum Sykes about how hard it can be to find a full sleeve length dress. I had never thought about that until then but I have noticed they are kind of rare. I don't know what climate you live in but if you have a real winter, the black might be really nice. I just think it is very classic and has a fun twist with the side detailing...let us know what you decide!