It might be best if it is left for each to make their own investigations via Tech bulletins on the associated CDs etc.
My understanding is that the locks each have two motors. One for normal locking, and one for superlock.
Lock/unlock of either motor system is executed by reversing the current through the motor depending on selected action at the time.

As I read what I can find on this topic I get the impression that it is not necessarily the motors that fail but more the associated complexity of the mechanical components in the lock case. The micro switches themselves that detect lock position etc may be a significant contributor to that frailty.
I don’t know this but suspect that if the micro switch does not detect full closure or superlock complete then the motor might continue to run and go through a “loop” . It would be interesting if not helpful to know if anyone else has more experience with this.

Looking at the door handle I removed a while ago I have reminded myself that the associated rod is screwed into the handle mechanism pivot. That suggests some setting up is required.

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