I just scanned through the 2.1 movie, and many parts look very good. The sunset in particular looks better than I've ever seen it look before.

There are some color problems that I noticed. In the dinner scene, the colors look off. Compare the colors of the flowers and foliage behind Owen to the still of the Senator Technicolor print. The greens are less bright, the purple in the flowers is too gray. It may just be my screen, but the reds (especially the skin tones) look too dark or gray, and the image often has a cyan push. This is very noticeable in the Death Star council room and in some shots in the escape from Tatooine, and the searching of the Falcon on the Death Star, to name a few. The faces have a green cast, which makes them look rather sickly. It may be that the original had a lot of cyan, but in the Senator print, especially in the "the Force will be with you" image of Ben, his face has a lot of red, which is missing from 2.1.

I wish I had a properly calibrated monitor to view these colors, but if a side by side comparison of two sources on the same screen shows different results, then I must assume that there is a very real difference between the two sources, or that VLC is not handling the video correctly.