If all you can find is the PPQ, and it meets your needs, then why look for the FNS?
Logistics sometimes has a reason for offering only one model and not the other. Recalls, problems at the manufacturer, importation, or other things could create a state of none availability.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
Life Member NRA
Life Member NAHC
Former President of the ECPT (Eifel Combat Pistol Team)