The roaylaty mention is accurate too.
Blank CDs like audio & video components differ in quality too. Mostly though it's their ability to be used with the burner in question. some burners like some blank CDs, some don't. Many CD/DVD burner makers provide a list of compatible discs for use with their products. you can start there, but that list isn't cast into stone, unless you are calling the burner maker for support.... then you'll have to say you used their acceptable listed discs.