Also, the surley can more easily be transformed to single speed (if that interests you down the road). And it has huge clearance so you could basically even run a mountain bikish tire if you ever wanted to do so.
Surly's favorable reputation seems to be built on their thoughtful frame design (never leaving a rider saying "I wish my bike could....."). While BD seems to have a reputation for delivering top end components at bottom end prices on decent frames. Both business models are really good for a given type of rider. You have to decide which type you are.