Moved from the SR thread:
To give you an idea here's a comparison for frame 8228 between the bluray, Harmy's Despecialized Edition 2.5, and the bluray matched to the Technicolor IB print scans I have.
Bluray:
Harmy:
Tech IB:
and let's throw in the bluray matched to the GOUT for good measure. Note the reduced contrast, leading to some artifacts on Vaders's cape, caused by the crushed blacks in the bluray:
