Is there a difference between pressed CDs and silver CD-Rs?
Besides the fact that a pressed CD is made differently than a CD-R, the difference would be in the change of color on the bottom of the disc. A pressed CD has the same shade of silver all the way across. A CD-R will have a change in shade between the burned and unburned sections. If the CD-R was burned to capacity, there is no real way to visibly tell the difference between the two discs.