Yanagisawa only makes top quality saxophones. The AW01 no replaces the 901. It is their entry level pro model. Along with elegance of construction it is our belief that mechanically there is no better saxophone being manufactured today. It has a rich lyrical tone and is fast becoming the instrument of choice of some of today's most discriminating performers. Comes with a new deluxe case and a pro mouthpiece. This model represents an extraordinary purchase opportunity for any player that is looking for a great professional horn at a great price.