the ratio is very much dependent on the city. For example, I visit Raleigh often and stay at the Hyatt House Raleigh Brier Creek for 5K a night. The Aloft next door goes for 17.5K a night. I think the Aloft and HH are pretty comparable. So what does this all mean, I don't know

I think the ratio between Hyatt and Marriott points is a lot more complex than a ratio of 1:1.75:, 1: 2 , or 1:3. Maybe we need to throw in a city or region to be more accurate. Is there a thread that does a good job on the analysis of comparing points between Marriott and Hyatt?
The reason I always though it was 1:3 was I saw Hyatt and SPG to be about the same.