Originally Posted by
travelexpert
Most significant downside with MR based on what I have read at FT is that Starwood is more generous with upgrades.
Not unless you're Platinum with Starwood, has been my experience. Lately (last 5 years) I have seldom been actually upgraded* as a Gold SPG, but frequently received upgrades to suites with Marriott.
Now, if you make Platinum with SPG, you do get suite upgrades more regularly than as a Platinum with MR.
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*I'm not counting the "upgrade to an SPG room" which seldom means anything.