A couple of reviews from the SpareChange youtube channel on the more visual / audio / technical aspects of the new 4K blu ray releases:-
‘Is Disney+ Good Enough? Star Wars Trilogy 4K Blu-ray Review’ - https://www.youtube.com/watch?v=wGLco4P72TA - sade1212 found that the video is likely using 2011 blu ray footage (see posts below for more info)
&
‘4K Physical Media or Disney+? Star Wars Prequel Trilogy 4K Blu-ray Review’ - https://www.youtube.com/watch?v=8vMY_XSJdGg