I think it was in here that I read something about this disc www.thedvdforums.com
From what I remember the R1 Dolby Digital sound is way better. Bass is very weak on the DTS version, just like the 1st pressing of the Jurassic Park DTS DVD. I almost hunted down this Japanese DTS Blade but than decided against it. To bad it doesn't sound like the DTS LD, I've read that was reference quality.