Well...I'm not sure that is completely true. The engines aren't built by Ferrari technicians as Ferrari engines are (despite all the marketing hype), they may have had a separate construction line at Ferrari and built with different components, but now even less so with the separation from Ferrari. The modern Maserati cars werern't designed and built by Ferrari guys devoting Friday's to their little "Maserati side project." It is Maserati people designing, contracting, and building the coupe and spyder and certainly the QP (the MC12 much less so admitedly).
I think Maserati deserves some credit as a separate business enterprise that certainly should be thankful to Ferrari expertise, but that is waning. They are a fine outfit on their own right.
So many companies nowadays are intertwined, but they should still be recognised for their own defining character. Maserati is clearly a separate endeavor from Ferrari, and I for one am extremely thankful they make the cars that they do....and they don't need to hang their collective heads in servitude to any other entitiy in my opinion.