The document compares the functions and capabilities of several key cloning devices: MiraClone, AD900, ZedBull, RW4 TRS5000, and 884. It outlines their abilities in areas like cloning functions, updating/firmware, eeproms, pin codes, programmers, generators, and catalogs. The MiraClone appears to have the most extensive set of functions, including capabilities for cloning various transponder types, standalone cloning, identifying new transponder types, updating regularly via the internet, supporting many eeproms, generating cryptographic transponders, and including vehicle catalogs.