"As a technical side-note, these are the only LaserDisc's of the Star Wars films to be encoded with Faroudja Lab's Super NTSC process which produces greater color resolution, reduces chroma noise and eliminates most of NTSC's artifacts such as dot crawl and flickering rainbows on closely spaced diagonal lines. While Super NTSC produces improved picture quality with all types of comb filters, when a Super NTSC LaserDisc is decoded with an advanced Motion Adaptive 3D comb filter, color resolution of up to 160 lines horizontally and 480 lines vertically with no loss of vertical, horizontal or diagonal luminance resolution is possible."
Written by DiscLord (R.I.P.) so reliable info.
That's why my poor test capture I used for SR upscales works so well!
LDDB link: http://www.lddb.com/laserdisc/07972/4102985/Star-Wars-Trilogy:-Special-Edition-%281997%29