Earlier quoted context omitted.
For general working, trackpad is better. You can type and move the mouse without moving your hands.
Did you mean a trackpoint? How can you type and move the mouse without moving your hands with a trackpad?
Or, it's close enough that with hovering hands you can move back and forth between keys without looking. It's much faster to navigate a code base that way, I think, than trying to jump in vim lines at a time. A smooth, continuous scroll at easily controllable, different speeds does wonders for keeping continuity of a file in mind.