Cylinder Head designation 2013 Prius

I recently completed an engine exchange in a 2013 Prius. The original cylinder head had the designation X2ZR-W25N and the donor motor had the same designation minus the "N." The motor runs well and all sensor connections were the same. Does anyone know what the difference is between these two cylinder heads? Also, I think the motor is 2ZR-FXE in both cases but not positive on that. The donor motor (minus the N) was also from a Gen 3 Prius.