Thanks DaveM. That thread helped quite a bit. I've pasted the GO priority you posted earlier:
1. Multiple-week GO owners
2. Single-week GO owners
3. GO owners returning on an exchange
4. Other Marriott multiple-week owners on an exchange
5. Other Marriott single-week owners on an exchange
6. Rental and preview guests
7. Non-Marriott owners on an exchange
So, it again appears that no matter what Marriott room type I own, it would not be considered in whether I could exchange into an Ocean Front room. The drawback for me would be the low priority as single week Marriott owner should there be other requests for the same time and room type. But regardless, my chance of obtaining the OF room would be the same no matter what room type I own.