the most noticeable thing about the difference in stance I find is that since I have enough power to need the stiffer torque side spring the car can give a little squiggle when the spring unloads after launch when backing off while street driving .
SpeedracereX you might not notice much for a while if you bought the softer springs for the lighter cars , mine where okay for a couple of years until I upped the power and then they went soft pretty quick on me , I think a pinion snubber might extend their life by limiting wrap but would still always recommend buying the proper springs for the weight of your car and I've never seen a second gen Abody that weighed 2800lbs in street trim .