My understanding is that all the home video releases had the matrixed surround in the stereo tracks. The 1985 mix was done differently for CBS Fox. Rather then use the studio mixed stereo track, they used the 4 indivdual tracks and encoded them in house to matrixed surround. I don’t know who did the mix for the Definitive Collection/Faces/2006 GOUT, but it definitely is matrixed surround. I have decoded all of them and certain scenes reveal improved sound on a 5.1 system, particularly the Luke and Leia chasm scene and sound like the distinct channel audio of the 97 SE and later.