The Region 4 version of this disc misses out on;
Theatrical Trailers for Sueno, The Gospel, Boogeyman, Open Season, The Cave, The Da Vinci Code, The Grudge, The Pink Panther (2005), The Amityville Horror, The Amityville Horror (2005).
The Region 1 version of this disc misses out on;
Italian Dolby Digital 5.1
Theatrical Trailer for Stealth.
The Region 1 and Region 4 versions can be considered equal, unless you speak Italian.