Who looks at post titles?
And yeah, I believe the only difference was the opening shot of the film was redone to accomodate the new title, including the crawl and the first shot after the pan-down from the crawl. This was done so it would be easy to just take 1977 prints and splice in the new first shots, if I'm not mistaken (ironically, the reverse happened with the GOUT DVD - the original source material was an '81-or-later print, and they spliced in a scan of a '77 print for the original opening shot/crawl).
The only other difference (if I'm not mistaken) is that the 1981 re-release was never shown with the mono mix, just the '77 stereo mix. (I'm also not sure if the '81 version was ever released in 70mm.)