That is true, but if I'm not mistaken we are mostly just assuming what is in the 70mm mix based on hearsay and what is in the Special Edition...
When R2 is being loaded into Luke's X-Wing, C-3PO says the word "and" more audibly before saying "do take good care of yourself."present
C3PO has an ADDITIONAL LINE (not documented elsewhere) at the beginning of the carbon freezing scene. "Oh dear, what now? I don't like the look of this."