I've been platinum premier about 3 years and with MR for about 9 (guess I'll hit the lifetime threshold for platinum in another 3 years). Not really sure what the difference is, but I tend to get upgraded to suites a lot if they are available and the staff seems extremely responsive if I call the at your service number. Other than that, I think I get the same thing with respect to gifts and reservations. One of the MR agents told me they select about 7000 PPs each year based on stays and revenue but she would not go into the details. I've done about 150 nights a year for the last 9 years in everything ranging from fairfields to full service.