In perusing the scant selection of jazz CDs at Best Buy this evening, I saw two versions of John Coltrane Blue Train. One was the basic version for $11.99. The other one was an Enhanced CD that comes in a cardboard slipcase for $14.99. Aside from the obvious difference between the two versions, that being the CD-ROM extras on the Enhanced CD, is there a difference in sound quality between them? Does the Enhanced CD benefit from advanced remastering? There is only a $3 difference between the two versions, but I'm just curious. Thanks in advance.