Opportunities for Resource Sharing through Prospector and SWIFT

In Colorado, just as in most states, there are different ways to participate in resource sharing through libraries.  SWIFT and Prospector are two of the most well known systems for sharing materials among libraries.  What makes these systems unique to one another?  How does one decide which system is best for the library?  What are the advantages and disadvantages of each system? Representatives that use both systems will share their experiences with participants.