Don't they have different rated SHP too?
As I understand it, in the 850 once you are in cruise, there is a '850 mode' that puts the flaps to -5deg and changes the max hp of the powerplant to 850. So while for takeoff and initial climb they are limited to 700, in cruise they have 150hp extra which adds to the top line cruise speed (and fuel burn). I am not sure whether the '900' and '930' use the same setup, I remember something that they have the full 850 for takeoff.