The SE Boxset transfer is significantly Better than the THX 'faces' (K) discs. Like someone said above, the faces discs seem gundgy, like there is a thin veil over the picture. The SE dics are as good as some of the best non-anamorphic DVDs I've seen. It is VERY good. At least on my setup it is.
I've got both and don't remember any motion artifacts on mine. I'm using and iScan Pro, though. The biggest difference is in the color timing. The SE is much improved. There is a scene in the beginning of Empire, in the hangar, where a 'cart' goes by. It has a marker light on the side. In...