I just sat down with the contract outlines from IAC and Parc and used the outline from the HACS/CREW website and simply added up all the bits and pieces for a total after 5 years.
Assuming I checked the figures correctly IAC were better by around $8,000 after 5 years - exactly why I don't know.
Once again not commenting about the "quality" of any agencies, simply looking at the $$$$.