Can anyone confirm that the m300 HD is just a higher weight class rating of the m300?

So, from an electrical standpoint, there should be no differences between the two models (tilt/lift/recline/legs actuators may be heavier duty but the electronics and wiring should be the same?)

Said another way, I should be able to swap electronic components from one model to the other without concern for compatibility issues (I obviously have one that isn't running and want to restore it to health)