Position and acceleration dynamics were paired in a 2-coordinate tracking task so that both identical and different dynamics were used with the following display-control configurations: 1-dot display, 1-stick control; 1-dot display, 2-stick control; 2-dot display, 1-stick control; and 2-dot display, 2-stick control. The results showed a striking shift in the order of tracking proficiency for the various display-control configurations with the change from identical to different coordinate dynamics. When the same dynamics are used, the influence of displays predominates. However, when different dynamics are used in each coordinate, controls are the important determiners of accuracy.