The SE mix, better than the 70mm? Don't make me laugh. The '97 mix is very dynamically shrunken compared to the 70mm version, and often sounds tinny and weak in general. It's not nearly as bad as the 2004 version, of course, because it's still recognisable, but it's really not that good a lot of the time.
Steve Hoffman, who got to see a good condition 70mm print a few years ago, agrees with me. http://www.stevehoffman.tv/forums/archive/index.php/t-141011.html