From what I've heard the Black Pauldron Sandtrooper is a straight repaint with the same accessories. The funny thing is the colored part of the pauldron was an insert and the black ones were just missing them. The original pauldron has the insert and has been sculpted correctly for a colored pauldron, but not for the black one.
Darth Vader and Luke look good compared to 3 3/4" but compared to the high end 12" lack a good deal of realism as to be expected. I am very interested to see them in person.