I own boatloads of MRP and SPG points. The ratio is different in value but I don't value one system over the other. I have both credit cards and enjoy staying at both brands. I am just very surprised by many posts here implying that Starwood is somewhat superior to Marriott. Quality is independent at each hotel and timeshare. I love JW Marriott (hotels) for many years before I came to accept Westin as being as good and my husband was the other way around. He now strongly prefers Marriott as a brand, hotel and timeshare. My experience at Marriott (timeshare) in Maui and Kaui was far better than Westin, so much so that I vouch never to return to the 2 Westin resorts there.