This video is a tutorial for setting up Native Instruments' Traktor Scratch system. While the setup can seem a bit confusing, with this video's help, you will be able to setup and use your system easily.
DJ Ty highlights some of the major feature differences between Native Instruments Traktor Scratch and Rane Serato Scratch Live. There is only $60 difference between Traktor and Scratch Live (Traktor is more).