boxy is roomier, kinda like the H2, Element, Scion, and since its an SUV, aerodynamics dont play such a big role in my opinion, the only thing about the bronco that would kill it is if they put a V6 in it, a truck like that deserves a small block V8, and lets not compare the Vx to any of these concepts as it is a way better vehicle and is yet a one of a kind...