Flexibility to change the screens, depends on what the small office is planning on using it for.. since we needed to upgrade office anyway we went and got the small business edition with BCM included.. Let's just say you get what you pay for and that is 1 of the reasons BCM isn't sold as it's own product AFAIK.. within 6 months of Implementation we were working with a partner to get Dynamics CRM up and running..
also, BCM takes some hoops to have the database stored on a server instead of the individual computers..