I think you won't find a COMPLETE list. All three movies contains subtle changes, some of them can be find only by frame-to-frame comparison. In 'Star Wars', lots of composite effect shots were redone by digital composition, some of them slightly differently, or a few frames longer etc. In 'Empire' and 'Jedi', lots of shots were edited down to make room for SE footage. One way to make a good comparison is by assembling a split-screen version of the films (which I did in Avisynth - loong edit list).