A lot of the differences between DTS and Dolby soundtracks has to do with the actual mixes, rather than the technology behind the sound. That said, I've found that DTS mixes are more likely to have a nice, "punchy" LFE channel than their Dolby counterparts.

Since "Superbit" is a Columbia Tristar thing, you're not going to see it on a Warner title. Remember that there's nothing really special about Superbit titles - they just guarantee to use the maximum available bitrate for audio and video. Many non-Superbit titles do that as well, look just as good, and actually come with extras! :-)