you know its not only brand, and processing power, voices etc. Its also support, its also standards, its also being able to handle lots of pressure due to ongoing projects 24 hrs, having better algorithm solutions for a/d, d/a, multiplexing, better components, better craftsmanship, better intuition and the list goes on...people see some stuff as boxes...its more than that..
Also, from a business perspective, price is what people are willing to pay for a product. If you are not willing to pay the price, then its not worth for YOU. Beleive me or not, pricing strategies are as delicate as the master clock in a Prism converter. Demand/Supply is a great way to start the calculations. Every price in a market are well balanced to an equilibrium level due to the buyers, the seller, the environment etc.