This is an absolute no-brainer.
The Region 4 version misses out on:
The Region 1 version misses out on:
The fact that the Region 1 version was released 4 years ago, complete with new audio and video remastering, and the soon-to-be released Region 4 version does not, means that only the Region 1 version can be recommended. According to internet reviews, the audio and video quality of the Region 1 release is excellent. It is an absolute shame that 20th Century Fox has decided to release the movie in such a terrible manner in Region 4.