To me GHS precisions flats, Chromes, and other flats are slick, and rounds are less smooth, and offer more drag or resistance to movement. Guess it depends on the person.
You did not ask, but I carry a little bag of food grade, coconut oil which is semi-solid at room temperature.
In the unlikely event my sweat etc, causes stickiness, I rub a little on my fingers, and flats are slippery then. Too much, and it's like driving on ice.