I know the first one was altered for the SE (Vader was brightened), so Harmy definitely darkened Vader back to match his theatrical references. I'd say the others are correct too, because the GOUT, etc, were in general much brighter than the theatrical references he used. 30 years of home video gave us the wrong idea about how bright this film was...
EDIT: Two of these are featured in the comparison gallery. Definitely the way it was supposed to look.