What is replication?
Replicated discs are created from a glass master and stamper. The CDs are pressed using injection molding the information on the discs.
This format is able to be read by more readers so is more compatible for listening. They last longer than burned discs but minimum runs start at 250 units.
What is burning?
Duplication is the act of burning the information to blank, CD-Rs or DVD-Rs, with a laser to the disc in a CD-R writer or burner. Not as recognized by readers as pressed discs and don’t last as long before skips and glitches appear. But runs start at 100 units.