The bootleg seems to have a noticeable green shift, and a very slight yellow shift. I double checked in Photoshop by blurring the images so that I got the average color for the ‘black’ bars. Here are the images with a curves adjustment to return the bars to neutral gray:
http://screenshotcomparison.com/comparison/204846
This gets the shot closer to Mike’s preliminary grade, with the purple shadows becoming noticeable. This is one of the shots for which I have Tech frames, and the shot is definitely green on that source, to the point that Mike commented that it looked bad. It’s green to the eye, green when scanned.
Also, R2 is extremely blue in the bootleg compared to Mike’s photo.
From what I see, the Tech is notoriously inconsistent. For instance, all 4 of these scans were done at once:
The Death Star hallways are way too green and the skin tones too yellow in the first one, but they get much more blue with Vader.
The R2 shot has nice colors, but the final scene is notorious for being too red in the highlights, a problem that is much more noticeable without the luma correction.
The final shot is much more blue than the previous shots.
Also, notice that the audio strip which should be neutral gray has turned green in the hallway shot.