OK! I am going to rephrase that. The UN GMT Perpetual combines both of my Rolex DD and GMT2 functions plus more. The DD only provides Day Date function but the UN GMT Perpetual would provide a full Calendar. Giving me Year, Month, Day and Date. I know that I have to adjust the Rolex DD and GMT2 every other month for the Day. While both Rolexes are accurate, I do need to adjust the Time from time to time. So, every other month, I would check the Time when adjusting the Date. I expect to adjust the UN GMT Perpetual from time to time depending on how accurate is the watch.
Yes, on theory that the UN would need no adjusting but may I ask you how often do you adjust your UN for the time?