You might want to check these two out:
http://originaltrilogy.com/forum/topic.cfm/Complete-Comparison-of-Special-Edition-Visual-Changes/post/538921/#TopicPost538921
^ at the end of that post.
http://originaltrilogy.com/forum/topic.cfm/Complete-Comparison-of-Special-Edition-Visual-Changes/post/540149/#TopicPost540149
I'm not so familiar with the 2004 re-mix and I haven't heard the 2011 re-mix to tell if these are true or not.