Do the other tracks have DialNorm applied? In putting it together I was using Belbucus' level-adjusted 35mm version which has the average level approximately the same as the '93 mix, so if that was the source for that mix on the dvd then it shouldn't have needed any further reduction. The mono mix certainly would have, since it was only released with the peaks at 0, leaving its RMS level nearly five decibels higher. Flipping between the tracks on the dvd, it sounds to me as if the average levels are in the same vicinity, and that the difference in loudness is solely due to the 70mm and 1993 versions having greater dynamics. But I didn't really listen to the other ones that much, so I could be mistaken about that. This sort of thing can be hard to judge accurately, which is why there is a lot of general confusion about it.

But the dynamics are a big part of the reason the 70mm version sounded so much better (in addition to having bass and discrete channels), so with the average level the same as the other mixes, it seems appropriate that it would come off as being louder, since that's how it would have been in the theatres back then.