Blue Choose 78%
Black Choose 22%
The Blue is a normal dress as you wear it, if you hold a dress ..
The black would also be a normal dress if it would not be completely blended. Looks out when a skirt was pulled up under the chest.
At the top picture (blue) I like the color as well as the cut better. It also looks a bit more elegant.
The blue fits MMN more to your hair color. Besides, the black dress is a bit strange.
Thus: The Blue
The lower dress is far too gray and trist.
In principle, I would find the black handsome, but that has a funnyCutting shape in the chest area ...
The blue is to me hunched