Black Tie Social is the first mare's sire and the second mare's grandsire on both sire and dam side. He really seems to me that he carries the frame, from his facial marking, some of the pictures of his progeny as well as by looking at his line and seeing at least one frame overo near him. Both mares could be carring frame (the sorrel might be a frame, I think), but you wouldn't know for sure unless you tested them for frame. QHs are also able to carry frame, so you would want to test the stud for frame before breeding possible frame carriers.
Not impressed with the conformation of either of them. If I were to choose one over the other, I would pick the black. I can live with a little butt high and a slightly longer back (which are pretty common in paints with their QH and Thoroughbred background).
Nothing really stands out to me in the stud's pedigree (a couple in the third generation and more after that), but he could be quite the looker. Do you have any pictures of him?