The diffierence between Yogachara and Nagarjuna's Madhyamaka

Of Nagarjuna’s postion, there is no real basis for the world we perceive. Such a basis is vastu-shunya, i.e., substantially absent. By comparison, for Yogachara appearance depends on pure reality, i.e., vastu-matra. In fact, there is nothing except vastu-matra in the analogy of a clay pot, that despite its form—and its destruction into fragments—the clay-ness remains unaffected. The pot, in other words, is an appearance of clay of which it could be said, hides the clay-ness.