Panasonic PN suffix for their through Beam Sensors

With the Panasonic Through Beam Sensors like EX-11SA and EX-11SB, which have NPN output configuration. What difference does adding a -PN suffix make to these parts?

Sensor
Adding the -PN suffix like EX-11SA-PN and EX-11SB-PN, changes the output configuration to a PNP output.