Having just seen the fantastically well-preserved ESB Theatre bootleg, I am amazed at how close the GOUT seems match to it when you crank up its saturation to (or very close to) the levels I have suggested. It's pretty much the exact same thing for most of it, minus the colour-shifting due to print and tape fluxatuation and the occasional exposure wash-out or crush-down. But for example, the blueness of the Hoth and Bespin scenes is pretty much 100% the same as the caps I posted. There is one shot that was compared earlier to the SE trailer, an establishing shot of the Hoth hanger (when Solo first enters), where the SE trailer has much less blue, but in fact the theatrical bootleg has the exact same amount as the enhanced-GOUT I posted. Same with all the Luke-wampa scenes. It seemed pretty consistent that the GOUT enhanced in this way matched close to the bootleg.
This only highlights the dilemma I mentioned earlier: in order to have theatrically-accurate colour/saturation with the GOUT, you have to live with popping and noise and all those artifacts. It looks ugly sometimes, but that's the actual accurate colour level.