They also work differently. A business broker will usually work like a real estate broker. That is to say, they will try to acquire as many listings as possible in the hopes that some buyer will come along for each one eventually.Business brokers often belong to a franchise operation and have store front offices you can walk into and inquire about the opportunities they have for sale.
In contrast, you see intermediaries by appointment only. They are very selective about the clients they take on because finding buyers for larger companies takes a lot of time and effort. As a result, intermediaries will limit themselves to about half a dozen or so clients at a time that they can effectively market.