News; Sports; Life; Money; Tech; Travel; Opinion; Weather; Crosswords; Washington; Video; Newsletters; Stocks; Apps; Classifieds; Best-Selling Books; Corrections; Interactives; News tips; Photo galleries; Newsstand; Scores; Podcasts; Investigations; Policing the USA; Moonlighting; VRtually There; Job Network
So, in this case, 270,000 Marriott points are approximately equivalent to 100,000 SPG points. With SPG, you get 5,000 more miles, but with Marriott you get a 7 night stay. If we ignore the differences, we can say that we would need 2.7 Marriott points per SPG point in order to break even.
For example, if you are a Marriott Rewards member with Silver Elite status through February 2017 and an SPG member with Platinum status through February 2018, once you link accounts, both accounts would be Platinum level. Your Rewards account would have a new expiration date of February 2018, and your SPG expiration date would remain unchanged.