I will say this:
I made a rough encode, 1280x544, from the Renegade BDISO, which I uploaded for a friend of mine. He was impressed (considering that I had done DVNR on it, to mitigate the flaws of the source). I went through and compared my quick and dirty encode to the GOUT and it was a significant improvement, although I had probably filtered it a little more aggressively than Lucasfilm did.