Finance companies are recognizable as usually having storefront type offices and generally offer unsecured consumer or household loans on installment contracts. They do also offer some secured mortgage products but are generally thought in the lending industry to be a poor choice due to very high rates and fees that they typically offer.
The mortgage brokers have access to many different mortgage programs. It might be a good idea to consult your mortgage broker before and after talking to the finance company to see if which offers better program for your need.
Most finance companies train their employees to sell sell sell. Unfortunately this doesn't always mean your financial needs will be looked at objectively. Make sure you work with a Mortgage Professional you trust. You can always call me at 414-303-1215 for a first or second opinion.