Many of the websites that Gregatron linked to in his insightful and informative post unfortunately are no longer around.
In an attempt to not lose that information - and also the sterling efforts of Gregatron - the links in his OP have been updated to include working links from the Internet Archive’s WayBack machine.
^ There may be some familiar old sites linked to… 😉
Well in Gregatron 👍
Links have also been fixed/updated and added & compiled in the similarly older thread of:-
‘The changes made to the Original Trilogy films down the years…’
^ with various sources of information available during that time.
Along with several (15-20) similar older and somewhat outdated OT•com ‘comparison & info’ type threads - though still worthy of archiving; with some gentle yet thorough reminiscing - added to the:-
An Index Thread for Theatrical Cuts vs. Subsequent Releases
The current and up-to-date…
Complete Comparison of Special Edition Visual Changes
… discussion thread - by doubleofive - features an array of links to various sources covering the many changes made to the Original Trilogy films (in the opening post of the thread) - as well his own superb comprehensive projects on the changes made to the three classic films. It also serves as the main discussion thread on these many changes…