Thats not exactly correct above. The other sensor is inductive and gives an analog sine wave shaped signal. The Hall Effect is a digital square wave signal. There are Hall Effect sensors that are also designed to work with a magnetic trigger like the MSD, Hyperactive or Innovators West wheels. This is the best possible design in my opinion since it cures any chance of false triggering and the controller receives the preferred square wave signal. MSD makes a magnetic Hall Effect sensor that works with their boxes and all EFI systems. Hope this helps.