The models they are showing now at the DVC Sales Center on the boardwalk are of the Beach Club Villas rooms. And they are the same (including everything that is them in the way of furniture, TV's etc.) as the ones will be at BCV. As far as size, basic shape and design, number of beds, types of TV's, etc. goes they are the same as the ones at BWV and VWL but the decor and color is different for each resort and BCV's counter top, kitchen table, inner door location, bathroom fixtures, and some other things are a bit diifferent.
Also, in case I misunderstood your question, the 2BR units that are actually part of the resort and overlook the boardwalk are the same as 2BR units elsewhere in the resort.