I realize that you were asking about Marriott vs Hilton, but here's another point of reference as I made a decision about Marriott vs. Starwood. Last year I was Platinum in both programs, but because of reduced travel, I knew that I would have to make a choice as to which one to qualify for in 2014. Decision was super-easy because quite frankly, Platinum in Marriott was pretty useless (I travel mainly in North America). Starwood gives me room upgrades very often, free breakfast and free wifi. Plus I always get a welcome amenity (sometimes just 500 bonus points, but occasionally something nicer). AND nine times out of ten, they acknowledge me as a Plat when I get to a Starwood property. I was lucky if they seemed to even care at a Marriott property.