I don't know the difference, just that JPC is exactly N bytes smaller in all cases I tried it, however, I can't remember the N.What's the different between these two?
Just like there are several flavors of TIFF there can be several flavors of JPEG2000, and not all have to be supported. See also first post of this thread.If a software supports jpg2000 format should'nt it be using the JPEG-2000 JP2 File Format?
HTH
Roman