The only difference would be the commissions if you go through a broker and the fact that some contracts are inherently more or less valuable than others due to home resort, lead time to UY, and number of points (both current and contract size). Smaller contracts invariably go for more per point as do certain home resorts, esp BCV. My experience talking to people about this issue is the same as trading cars, that most want to over value what they have and under value what you have. In the end, the $$$ you'd save are relatively few and not worth the aggravations involved in most cases. I have done one direct trade of a different timeshare for a
DVC contract that worked out well for both of us but we still had to go through ROFR and a full closing with the DVC portion. The non DVC portion was a RTU so only a paper to complete and a transfer fee so we just split the total costs between us and each paid the average.