What's new, I asked myself:
Is there something different in the movement ... yes! More accurate moon (to 45,000 years?) and more accomodation of the changes in the calendar for Leap years.
Calendar Architecture seems similar to the perpetual exc for the longer power reserve from the IWC new generation movement. Better arrangement of the century slide means no changing every few 100 years.
They take off center seconds hand (it's on the 9 subdial) remove chrono counters, remove pushers, change moon display, put 7-8 day tractor motor underneath, add domed crystal, make platinum case, add all new moon mechanism, add refined calendar, etc. etc.