Those are almost the exact same thing - Lavet stepper clock movements. The difference is that they're geared for the coil to be driven at 8 Hz instead of 1 Hz.

Those are almost the exact same thing - Lavet stepper clock movements. The difference is that they're geared for the coil to be driven at 8 Hz instead of 1 Hz. That gives them the appearance of being smoother. Of course, the battery will be used up 8 times as fast (though they last a long time already). You have very limited opportunities to "crazy up" those style of movements, as the coil can only be stepped so quickly.