No, in addition to the CDJ-2000/900, Scratch Live can also be connected via USB to the CDJ-400, MEP-7000 and SEP-C1.
In addition to controlling Scratch Live, the CDJ-2000 and 900 can also display Scratch Live's music information (waves, cues, artwork, etc.; Note: only the CDJ-2000 displays artwork.) on their LCD panels (Note: the CDJ-900 has an FL display).
All Pioneer CDJ players can control Scratch Live if the previous control method of using the control CD that comes with Scratch Live is used.