Good point. I guess it does depend on the elements that are used. For example I think the audio on the Image and Criterion DVDs for RoboCop sound much better than any of the MGM releases. Nothing particularly different but it just seems like its mixed better. For example, check out the scene where Clarences gang open fire on the open highway before realizing Murphy and Lewis have maneuvered the car to the side of the van. The gun shots sound a lot better on the older release. They seem a bit watered down in the MGM releases. Interestingly, I have the MGM version of RoboCop for itunes and that version sounds better than the MGM DVDs!