Old and new fly wheel hub with differents definitions of trigger cam.

The change was in 2010 when the soft start was introduced.  Part of the change was a change in timing, which is done by the flywheel timing bars that pass by the trigger coils.   The timing delay, 3 to 5 seconds, is done in the module with a timing circuit.  

In the 912 IPC it shows both the new and old versions and a note on the new number:  a See SI-912-028 Advanced start system

Pull up the Service Information for more data. 

Cheers