Numark have pulled out a couple of variations to their Mixtrack II controller.
Mixtrack Quad seems to add two extra channels and gain controls to the mixer, alongside some extra coloured LED’s for a total of 16 colours, to identify different deck modes, such as cues, loops and sample playback. The platters have two zones and are touch sensitive. It comes with Virtual DJ LE software and has a built in, bus powered audio interface.
Mixtrack Edge keeps the built-in USB interface, but reverts to the two channel config and flattens the controls into a rucksack friendly format, whilst actually adding multifunction metal platters that control pitch, song select and cue mix.