Listening to dark_jedi's release through headphones, cycling between the '77 and '85 stereo mixes during the end credits. There is reverb in both, but it seems much more pronounced in the '77. In that, it sounds like it's not just reverb, but an actual echo. Listen to the horns in the beginning. There is still reverb in the '85, but the '77 almost sounds like it's in a tunnel. (Though in the end credits, the stereo in the '77 almost seems to me to be wider than the '85?)

You can also hear the echo in the Moth3r and Catnap telecines (in fact, I'd say that the mono fold-down makes it more noticeable...)