How does CD-RW compare with CD-R?
While CD-R, or CD-Recordable, is a “Write-Once, Read-Many” format, CD-RW discs have the potential to be written, then erased, then written to again. CD-RW media is generally more expensive than that of CD-R (from 50 to 200 percent more, although CD-Rs are often extremely inexpensive when on sale), but are reusable. Burning CD-R discs is faster, though how much depends on the specific drive.