... whiiiiiiich, makes a good argument for getting them in dvd instead?
In terms of image quality, yes. Because of the source material, there will probably be little difference between the two formats in this case. However, audio quality may be another matter. When considering the stereo-only tracks, both discs offer PCM Stereo: lossless, full-resolution audio, potentially of CD quality. Both should sound fine. The big difference comes in the 5.1 surround-sound tracks, for those who prefer that option. The Blu-ray offers DTS-HD-MA 5.1 (Master Audio) while the DVD offers only DTS 5.1.
DTS-HD-MA 5.1 means lossless, full-resolution audio of at least CD quality on all six channels. Plain DTS 5.1 means lossy, data-compressed audio on all six channels, roughly the equivalent of an mp3 at 192 kbps—a serious compromise. For those who enjoy the enhancements of 5.1 audio at full resolution, it may be worth spending an extra ten bucks for the Blu-ray—unless C Major screwed that up, too!
James