My concern with the second one is underwear.
I used to have a skirt made of the same fabric and it was very sexy because it draped so beautifully but it showed every single wrinkle or bump in my undies. So a dress will have the same issue but worse - I don't have any seam free bars but I suspect I will need one or maybe some kind of spanx or similar...
I dunno - what do you wear for a perfectly smooth sillhouette? Hollywood tape with no undies?

My life would be easier if I didn't over think trivial crap.