Honestly I doubt you'll notice the difference unless you drive ******* the track, or autocross. The strut rod suspension is a horribly cheap way of designing a control arm. Essentially the strut rods bear the load of the car accelerating and braking and try to limit toe changes as a result of these forces.
The stiffer bushings further limit toe changes so that the toe-in effect when accelerating is minimized. In the back, it's hard to say, they helped get rid of some clunks I had due to disintegrated bushings.
Yes, they are only $18 to buy but they are somewhat time consuming to install. The rears were a piece of cake, the fronts are a bit tougher because you have to dislocate the control arms to replace them.
John V