For mobile computing, there's no comparison IMO. With a touchpad, you have to shuffle your hands to the palmrest area to move the mouse. If your machine is on y

For mobile computing, there's no comparison IMO. With a touchpad, you have to shuffle your hands to the palmrest area to move the mouse. If your machine is on your lap, that might put your hands in a quite unergonomic position. And it of course interrupts keyboard input. And there's the subject of accidental inputs when typing.