No other differences, aside from the narrower imaging and flattened dynamics associated with the 35mm replacements. It's also possible that some instances of LFE bass may not have been in the original, or were mixed in a different way, though it's impossible to say for sure, of course. In any case they sound like they could have been there, or should have.
Actually, I wonder if it would have been better to use the '85 mix for the replacements instead of the '77. It sounds like it is an exact transfer of the 35mm version (with C-3PO's extra line dubbed on top of it), but it is reported to have wider stereo imaging than the original. I haven't actually heard it in a while (never bothered to obtain a pcm copy because I didn't think I needed it before). Seems likely the wider image would have been obtained through some kind of post-processing, so it's probably not an exact match to the '93, but it might have been closer and made it a bit more seamless. Oh well.
The imaging discrepancy with the 35mm segments is more noticeable in upmixing than in 2-channel, because sometimes you can clearly discern that more information is coming from the center and less from the sides and surrounds. I suppose if your speakers are all perfectly voice-matched (which they really should be) it would stand out less. Still, it's only really apparent for a few of the edits, and it's a small problem in the scheme of things. Your mileage may vary, of course, but I tend to find it less objectionable than some of the extra junk foisted on the '93 mix.