These are, in fact, remastered by JVC, which also makes XRCDs. Fantasy, which owns a lot of the old jazz catalog, licenses the recordings to JVC for XRCDs, apparently under an agreement which allows Fantasy to release the remasterings as well.
The only reason I can see for XRCDs to cost $10 a pop more is market segmentation--putting the same product out under two different labels and appealing to different markets (i.e., audiophiles and non-audiophiles) who are willing to pay different prices.
For more on what Fantasy offers, see:
http://www.fantasyjazz.com
The only reason I can see for XRCDs to cost $10 a pop more is market segmentation--putting the same product out under two different labels and appealing to different markets (i.e., audiophiles and non-audiophiles) who are willing to pay different prices.
For more on what Fantasy offers, see:
http://www.fantasyjazz.com