This one is drapey, IMHO, but not droopy. What is the difference?
The first fabric is 96% rayon, and 4% lycra. It has a silky feel, and very little body.
The second fabric is 92% rayon, and 8% spandex. It has a more cottony feeling, and enough body that the neckline doesn't lay flat. That seems a small difference, but it is definitely enough to notice. I wore it under my new McCalls 6408, a knit jacket out of red JoAnn's ponte knit.
You can see the difference here.
I am off for the weekend, going to a workshop on "Conscious Eldering: Aging with Intention and Passion", with a college friend from UCLA.