It's really weird in RCI how the older Marriotts that are still in RCI don't show the Marriott name.
One thing I like about RCI with having an individual membership is their "Last Call" deals. Especially for Gatlinburg. It's too bad that DVC couldn't have worked out some kind of deal for the members to have access to Last Calls and Extra Vacation Getaways. When my parents bought their II affiliated timeshare, one of the perks the salesman stressed to them was having access to Getaways. It actually pushed them over the edge to buy.
I like owning a stable so to speak of ownerships. We like owning DVC points to have the ability to book on property when we want, I like owning my Marriott for what it offers, and I like my dual affiliated resort that gave me access to RCI, too. Just owning DVC points couldn't offer everything I wanted.
RCI has some nice resorts - the Hiltons come to mind.

I do think the choices for Maui are kind of sad now - no Marriotts or Westins.