I thought the "sweetened" effects were done for the 1993 mix, and the 1985 mix was mainly to add in a few things from the mono mix that were missing from the 1977 stereo mix.
But I don't know too much about the 1985 mix, so I'm also not the one to ask about these things.
And Erik, the glass-breaking sounds were indeed added in the 1993 mix if I'm not mistaken.