Reprinted by the Holiday group with permission of TimeSharing Today Magazine this chart show 7 key criteria for the top 8 exchange companies. 

C.A.R.E. (Cooperative Association of Resort Exchangers) is a non-profit trade association that was established in 1985 by representatives from timeshare resorts who found that by exchanging vacation inventory among themselves, they were better able to satisfy their owners with increased vacation opportunities. Today, C.A.R.E. member companies offer over 2500 vacation properties and service approximately one million vacation owners and members. C.A.R.E. is an international organization, with members in the United States, Canada, Mexico, Europe and Australia.