There could be multiple parties involved in the decision making in foreclosed homes. But don't let this faze you. Nowadays, banks act quicker than what they used to be. Moreover, the bank's sales addendum supersedes the actual Real Estate Purchase Contract. So make sure you understand the fine print.
In a normal or traditional sale, you are dealing with the sellers--which, to many, makes it less complicated and simpler.
If you are working with a competent realtor, you will be guided throughout the process.
That is why it is important that you interview local realtors and take it from there.
In my opinion, "foreclosure experts" are probably those agents that work on the listing side of the transaction not the buying end. With this said, most real estate agents would advise you of the importance of seeking your own personal representation and not using the listing agent to purchase property. It's easily seen that in such cases, there could be a "conflict of interest" with agents working both sides of these transactions.
Hope this is helpful.