The only difference between the desktop and mobile barton is that the mobile can run the rated speeds on less voltage which is the result of handpicking the "cream of the crop" chips for mobile use. That due to the need for less heat and voltage in a notebook for extended battery life ect. So, subsequently, the mobiles tend to reach stellar speeds compared to their desktop counterparts. Oh, they are also unlocked unlike the desktop part so that goes along way when limited by ram ect.