I have no idea, there's a mixing of controller technology between all the different vendors on the different form factors for SD.
This is interesting...with regard to SDC
MicroSD.....Kingston 512 MB microSD Memory Card ( SDC/512 )
Compatibility at the embedded level....on the MicroSD/transflash form factor.
http://tinyurl.com/2vpp2g
Other than the SDC standard SD form factor with the radius corner on the C-one site...I do not see any other offerings.
This is the first time I have seen this new offering....now I see it designated at the MicroSd level.
doni