Ok that's what I thought the difference was just wanted a second opinion, my car is my daily driver, but if a tuner pulls up next to me and wants to cruise then it's my street car, stiffer springs result in more torque to the tires and less squatting, better launching. I just replaced the rear shocks, while doing this lowering process I am going to swap out the front struts, which one, I'm still debating on which to get. Deff going to get the camber caster plates, that's a must, it was springs or a tuner. I pick the springs, one cheaper, two it makes the car look totally sick. The tuner will be next on my agenda.