On one hand, I see your point...but on the other hand I think MR and HH are the two that are the most comparable head-to-head of the big programs.

They have the most head-to-head brand comparisons. They both have rural, they both have all-suite, they both have a global footprint (albeit with differing strong and weak areas), they both have several full-service to high-end brands. Either one could, in theory, be your "primary" chain regardless of whether you're a rural, suburban, or urban business traveler.

SPG and HY, by contrast, are primarily focused on the FS brands. (Although I like both Element and Hyatt Place and hope both continue to expand...)