1997 change, the shot of the X-Wing going through the explosion of the TIE Fighter, that shot is extended a few frames. Those frames were taken out of this shot, this frame is the last of this shot. You can see how the X-Wing doesn't rotate as much.
*EDIT 1*
(request, title change "Yet Even More Completer Comparison...")
The Humdinger shot, the garbage mattes disappear, not sure if it's 97 or 04. (The Wookiegroomer splits goes 1 frame off during this sequence, will wait until tomorrow to figure out when this one frame shift fixes itself....)