If you are looking for more precise handling, buy a fork that is stiffer. And aerodynamics are almost always more important than other factors if solo speed is your goal. In other words, I anchored the steerer tube horizontally 5 cm from the fork's crown seat and hung a 47.5 pound weight on the dropouts. In all cases a Dura-Ace hub was installed with the skewer tight. Again, I measured deflection in the direction of loading.
Torsional deflection is the result of a twisting load on a fork.
I didn't measure torsional deflection because I believe it has almost nothing to do with how a fork experiences loads during real-life road riding. If riding did load the fork torsionally to any significant degree, we would have to wrestle the handlebars to keep the front wheel steering correctly. Even during cornering, a rider applies virtually no torque on the bars. You can't apply or resist significant torque without hands on the bars. Now we get to the controversial part.