They were made by the same company, and were slightly larger(taller screen) than the racepaks, and more expensive. I believe they could accept more sensor inputs, if you wanted jackshaft rpm, water temp, 3 egts,ect. It does all the recording of these inputs, and can be downloaded to a computer. If you need all of that, it would be a nice unit, if you just want rpms and egts, maybe water temp, there are smaller units out there that can do all that. It is a nice high-end unit, though.