Well, technically, a Sight Tracker front sights recoils higher than a slide mounted sight.
If you guys think about how a slide cycles, you'll notice that the slide is moving to the rear.
The sight being mounted on it, it also moves to the rear and then it reduces the angle of flip as it moves toward your hand.
The front sight being stationary on the Sight tracker, it moves up with the muzzle of your gun.
I've rarely seen shooters being able to have a perfectly flat recoiling pistol in limited/standard. Almost all of them have some kind of muzzle rise.
What I have experienced and can certify is that IF you pay attention to your FS during recoil, you will see it better in a Sight Tracker configuration because it moves in only one direction, up.
On a regular configuration, it moves up and rearward.
But you need to be really aware of your shooting if you want to notice that. I had to shoot more than 10 000 rounds before I actually realized that i was tracking my front sight better with the ST. But the concept of the ST works, and it works great.