The Rifftrax version is definitely too bright - the black in the starfield/space scenes is a dark grey, while on the KCCI version it is pure black.

I suspect that the KCCI version has had some noise reduction filtering applied, the image seems a little soft as a result. Anyone know it's history? Did Rikter actually have access to the original analogue tape? (Come to think of it, the disc I have is not even Rikter's, someone else re-authored it with different chapter stops.)

One other thing I'd just like to note - if anyone has "obtained" the Rifftrax HS DVD who didn't purchase the original audio, please "do the right thing".