MrTennis,
I own several (actually more than several) Japanese CDs, latest release and latest release in SHM. I believe they are identical (same mastering) except for the Super High Material.
The differences I note are a very slight increase in clarity and a slight increase in high end refinement. As I mentioned, if the sound of the CD is not very good to begin with the SHM is probably not worth the effort. However, the SHM can make an excellent sounding CD sound just a bit better. Again, not by leaps and bounds, but by a more subtle magnitude.
Whether that subtle difference is important enough to seek out or pay a premium price for is an individual decision. As far as the original post, definitely don't see these replacing SACDs.
On a related note I have heard several of the new HQCDs and IMO they sounded rather good. I believe these were produced in response to the SHM-CDs. I also have several Miles Davis Blu-spec CDs on order which should arrive around the first of the year.
I own several (actually more than several) Japanese CDs, latest release and latest release in SHM. I believe they are identical (same mastering) except for the Super High Material.
The differences I note are a very slight increase in clarity and a slight increase in high end refinement. As I mentioned, if the sound of the CD is not very good to begin with the SHM is probably not worth the effort. However, the SHM can make an excellent sounding CD sound just a bit better. Again, not by leaps and bounds, but by a more subtle magnitude.
Whether that subtle difference is important enough to seek out or pay a premium price for is an individual decision. As far as the original post, definitely don't see these replacing SACDs.
On a related note I have heard several of the new HQCDs and IMO they sounded rather good. I believe these were produced in response to the SHM-CDs. I also have several Miles Davis Blu-spec CDs on order which should arrive around the first of the year.

