The R1 versions of this particular package (and also BD) includes two featurettes that we miss out on:
- "Knowing All": The Making of a Futuristic Thriller
- "Visions of the Apocalyspe" Featurette
The drawback is that all reports I've read of the R1 declare that the video and audio transfers are not very good, which suggests to me that it's a toss up between getting the extra features or having a more watchable film. Maybe hang out for a superior BD release?