Probably a right PITA.....

however....too much time on my hands sitting in dingy hotel rooms for work away from home.

I did a transparent plan image overlay of the two to see just how much bigger it is.
I'm assuming the webbing pattern on the outer casing would be proprietary and hence of similar dimensions.

So
The rotor body seems to be about 27% longer (14 webbings against 11)
The Intake ports must line up 'cause RobertAMG fitted one to his M112
The gear housing at the front is much longer and RobAMG had to fit an additional crank arrangement.

Why you might ask....?
2.3L/1.6L increase in boost - so >20psi
It may run more efficiently at these levels = cooler, less crank drain.

Just throwing it out there.