I've got the DualDisc too, and at best, it's a marginal gain from 44.1 to 48khz. But that's about it. This thread below suggests the DualDiscs don't really offer much over the traditional CDs (or should I say, the relative absence of DualDisc mentions in the thread would suggest that). DM used the same master as one of the CDs for the DualDisc, and I suspect that's the case for DBTT as well. So slightly higher quality but that's about it... forums.stevehoffman.tv/threads/oasis-albums-best-audio-quality-cd-release-of-each.198997/page-6#post-18327065
