Old thread, but having now recieved and used my BC, I'm now in a better position to comment on BC vs. MaltMill.
My conclusion is BC all the way! It feels like a better-built product, and gave an absolutely beautiful crush at the factory setting, with my old corded drill attached to the driven roller. My efficiency was only 72%, but that's the best I routinely see anyway, as I'm still optimizing other components. Given the choice, I'd buy the BC again in a heartbeat, and the customer service during the ordering was outstanding.