.....it's probably more the way different people look at the things, or the different perspectives.
To me, it's very obvious that those two movements share a significant part of their design - but I'm not an engineer, not a watchmaker, ......hmmmmm I'm nothing I guess 
And yes, the FP base design is very unique in large parts and looking at the concept (not taking in acount the several details which, partially, of course have been designed/appeared before - more looking at the combination of all) - to me it's more than obvious that one of the designers of the new "JLC" movment had more than only a qick look at the FP movement.
Perhaps you remember the "brand new inhouse caliber" for the new IWC Ingenieur - later revealed to be a 7750 going train, all chrono parts striped and heavily reworked - but still a base going train of the 7750 (funny it's even happening under the same "group"
).
Of course "...there's no FP caliber in any current JLC...." - I'm not sure I should only be disapointed, laugh, .....surprised or whatever .
I'd not be surprised anymore if we hear some explanations like "...of course we had a look at some other companies designs, ....there's no reason to invent the wheel a second time...... there are only certain ways to design a xxxxmovement - so you can't avoid similarities like this...." - my personal favorite coment is " inspired by...." 
As I said, I know nothing - but don't be surprised to learn, somewhere in the future, that this movement in it's existing form isn't even an JLC inhouse design (or reinterpretation) - perhaps it's even born on the drawingboards of another famous "Richemont group member" - not specifically well known for it's movement expertise - later transfered to the "movement expert company par excellence JLC" ....and seeing the light there as original JLC inhouse movement.
But of course that's purely hypothetic....and only my uninformed, wild ideas.
The only thing I really don't understand - why can't this be openly comunicated.
Best regards
Suitbert