Complex sentence: Two of these DVDs feature the Taiwanese Mandarin-dubbed version (with imbedded subtitles) on it's own-one of the DVDs contains a Dolby 5.1 soundtrack, whilst another contains both Dolby and DTS soundtracks.
Split into simpler sentences: Two of these DVDs feature the Taiwanese Mandarin-dubbed version with imbedded subtitles. One of these contains a Dolby 5.1 soundtrack only, whilst the other contains both Dolby and DTS soundtracks.