The Region 4 disc misses out on:
The Region 1 disc misses out on:
The Region 4 disc is quite good, but the Region 1 superb. The Region 1 video is crisp and sharp, with no moire, and no aliasing - the helicopter mentioned above is crystal clear. If you buy the Region 4 I think you'll be happy, but if you buy the Region 1 you'll be even happier.