Ben Burtt did a new mix which was a amalgamation of previous mixes, according to the notes included with the Laserdisc.
He also added more oomph in explosions etc.
“New” in this case means “new in 1993, and still relatively new in 1995”. There’s some minor differences even between different releases of the 93 mix, due to the variability of creating home video masters at the time. Any differences in a 95 release are of the same sort and degree.