While I don't think the coffee is any better at Westins, but you will definitely upgraded to a suite more often at Starwood. I have been Platinum at Marriott for several years and have been only been upgraded to a suite once (although did get suites several times at one hotel; but they were all given by front desk assistant at that hotel that i "dated" for the few weeks i was there). I woke up at the middle of this year and saw the light at Starwood who comped me platinum and I have received suites on 70% of my Starwood stays since then.