ESB has the most audio differences
16mm
35mm
70mm
Special edition
Radio drama
The story of vinyl LP
Soundtrack
It’s the film of the OT with the most audio either featuring in a separate mix of the film or in other material made intended to be in the film but omitted.
This pertains to both music and sound effects and alternate dialogue.
There are many differences between the mixes and a lot of unused music, dialogue and sound effects.