Ok, I concede that based on numbers, RCI has 'many, many more' resorts than II.
However, I was wondering how they could have similiar sized directories with that difference in number of resorts, So I checked both my RCI and II books.
RCI lists hundreds of resorts as 'Other Vacation Destinations - Limited Availability'. No picture, no description, nothing listed except Name and Address. 250 such resorts listed for Africa, and nearly 300 such resorts listed for Asia. (By comparison, II has 7 Africa resorts similiarly listed, and 6 Asia resorts).
For me, I guess it's not so much the total number of resorts, but the number of resorts I would actually want to go to and be able to exchange into. I have not had any trouble exchanging my 5-star resorts to a number of Marriotts, and also to the Royals in Cancun. I've also booked many weeks at Marriotts using the getaway program.