I have no idea. Regardless, I don't see the desire to buy Star Wars again for some imperceptible difference in video. It feels like spending money unnecessarily.I wonder if when you watched HD if they had artifical motion smoothing on. Some sets that are 120hz or 240hz use interpolation to artificially change the 60hz TV signal and morph the frames in between to achieve a higher frame rate. This can cause what is sometimes called the "soap opera" effect when it makes the motion appear unnatural.
Mileage, etc.