Nah, the 1993 versions are mono surround only.
The one for the first movie was made by using the four main channels of the 70mm mix (L, C, R, S), combining it with additional bass derived from a separate sfx-only master, and then adding new sound effects on top of it in certain places. The mono surround of the 70mm is presented as is with no modifications, aside from some of the new additions also appearing in the rear from time to time.
For ESB, they did not use the 70mm version, but instead took it from the original four-track master conformed to the 35mm edit, adding in bass using the same method. Minor differences exist between this version and both theatrical mixes, but they are very small and the overall sound is very close to what the 70 would have been (when the film was slightly re-edited for 35mm, the entire mix was not re-done but only given minor modification, mainly for the new edits). Again, the surround effects are mono.
Unlike the other two, RotJ '93 is a new mix from multitrack stems, and so does not reflect what the 70mm would have sounded like except in the general sense. However, it was done in the same way, and again has mono surrounds. Since these were only made for home video viewing and intended to be decoded by Dolby Prologic (stereo surround decoding did not yet exist in any Dolby product), there was no reason to do them in any sort of 5.1 style. No 4 or 5 channel version of the 1993 versions was ever made; they were matrixed stereo digital mixes only.
When decoded with Prologic II or other stereo-surround capable algorithms, it is true that these mixes will show separation between the derived surround channels. However, this content consists only of crosstalk from the front. The actual surround effects themselves are mono; they are equal in level between both rear channels. Discrete channel 70mm versions would not have had such crosstalk, so a decoding scheme that allows for the least perceptible amount of it will most accurately reflect what the source would have sounded like prior to matrix encoding.