Leias hologram in Ben’s hut is more transparent in the 2020 blu-ray, compared to the 2011, in the final shot:
https://screenshotcomparison.com/comparison/2683
The 1997 version is the same transparency as the 2011 version
And in the first shot as the hologram appears, there is a strange animated painted blue blob that appears for a few frames over the hologram on obi-wan’s hand
https://screenshotcomparison.com/comparison/2684
That doesn’t appear in the 1997 version