They can be the pcb have holes for PCB mounted switches. At least for the B.face
When people say the switches are 'PCB mounted' they typically mean that there is no plate involved: The switches are soldered to the PCB and the PCB itself is mounted to the casing.
The Winkeyless cases don't allow for the PCB to mount directly to them - they rely on the plate for this. So, while you can use the PCB mount switches with the extra plastic pins, it's still a plate mounted board.