Originally Posted by
lexdevil
That's going to happen regardless. If they go with Marriott codes the SPG locations will have to learn them. If they go with SPG codes the Marriott folks will have to learn them.
No one seems to know on the SPG side how their codes work or if whether the hotel sees anything beyond plat.
It's my impression the Mariott reservation system, aka Marsha, will be rolled out at spg full service properties. Just seems extremely unlikely they would change the existing codes.
https://www.flyertalk.com/forum/marriott-rewards/1548226-marriott-system-code-quizelet.html