I posted 2 examples (there are more) on SLWB that confirm it's different:
1) During the outpost scene (post-desert) the voice that says, "Sergeant, listen to this Corporal for a moment." has changed
2) During the grotto scene, Tuco's words have been rearranged during his monologue and dialogue with the 3 bandidos. His voice has been altered to sound deeper too.