The 5.1 remix doesn't contain any new effects, as far as I can tell. Its fidelity is also fine.
Comparing only 2.0 tracks:
1989 MCA LaserDisc [40810]: No issues. Detailed, clear, pristine.
2003 R1 Universal DVD: Like the LaserDisc, though its high end is slightly rolled off.
2023 Shout Factory UHD Blu-ray: A downmix of the 5.1 with strong limiting, but no actual clipping.
