What's the difference between a customer relationship supervisor and a duty manager?

The difference between the guest service director and the duty manager is that the guest service director is directly responsible to the assistant manager in the lobby or the hotel duty manager. According to the relevant public information, the director of customer service is a post set up by some large luxury hotels in order to establish and maintain good customer service relations. The guest relations supervisor is directly responsible to the assistant manager in the lobby or the manager on duty.