A "Multiple Listing" allows REALTORS® to put your home on the Real Estate Board's MLS® System - a great tool to market our your home and help find a buyer, because the listing information is shared with all the members of the Real Estate Board, here in Cambridge that's well over 300 members.
With an "Exclusive Listing", there is no automatic sharing of information without the consent of the Listing Brokerage, which technically only allows the Listing Brokerage to find a Buyer for your home.
Personally, MLS® listings are "the way to go" after all, isn't it the REALTORS® job to let as many people as possible know about your home? It's the best way to maximize the selling price of your home!!