Very unlikely. You need a specific number of Brown credits to graduate, and you would not be able to transfer all of them. However, the open curriculum makes it easier to transfer some things, like advanced language courses, for example. I went to Brown many, many years ago, but even then, AP credits and other courses were not worth much. This is true of most competitive schools. They do need to make money, after all. I'd call and talk with someone about what exactly would transfer, if that is a concern. Often, though, it is department specific.