To add a bit to Helmut's answer
Before I even started in the European Aristocrats project, the decision seemed to be to use Savoie, and I'm not sure of the reasoning for this. Perhaps because as Helmut says that Savoie is now in France and certainly during the medieval period they seemed to be aligned more with France?
However they gradually gained more territory in Italy and from about 1563 they made Turin (Torino in Italian) their capital, and later were created Kings of Sicily, then Sardinia, and finally became the modern Kings of Italy. In which case it seems more appropriate to use Savoia.
My vote goes towards using Savoia as the LNAB.