AnyDVD, CloneDVD, and CloneCD are all software solutions developed by RedFox, previously by SlySoft, that aid in copying CDs and DVDs. However, they each serve distinct functions:
AnyDVD is designed to remove restrictions on DVD and Blu-ray media. It allows for the removal of region codes and other protections such as CSS that prevent you from playing or copying the disc.
CloneDVD is used primarily for copying DVD video discs. It compresses long footage at high speed and very high quality. CloneDVD can also perform transcoding, which means it can change the format of the video data on the fly while copying to a DVD.
CloneCD is specifically designed for copying exact, 1:1 duplicates of your music or data CDs.
For best results, many users use AnyDVD in conjunction with CloneDVD. AnyDVD works in the background to remove copy protection, while CloneDVD is then used to make the actual copy of the DVD.