The 5.1 / 4.1 from the 1999 DVD is a weak upmix of the Dolby Digital 4.0 (see the comments I linked to in post 17). Its only real worth is to completists, I can't imagine anyone preferring it over the others.
If hairy_hen is correct, and the 4.1 from the BD is in fact the true theatrical 70mm, it's much more important to include; it's a pretty robust track if memory serves.
I'll see about getting some more reference pics from the book up later.