The statement that best describes the difference between architectural developments in Russian and Inca culture is: "Russian architecture emphasized the rectangle, Inca architecture emphasized the sphere."
This highlights a key difference in architectural styles and geometric principles often observed in the two cultures, although it's worth noting that this description may simplify complex architectural traditions. Inca architecture is renowned for its impressive stonework and unique shapes, while Russian architecture often features more angular and rectilinear designs, especially in traditional structures.