I went from Nitron singles 525/650 on my 2006 Elise to the track-pack Bilsteins on my 2008 Exige S240. The Exige is stock ride height, stock toe, more negative camber.
My first impression of the Bilstein's was they were VERY soft and made the car "wollow" when changing direction quickly. However, they feel more planted in fast sweepers than the Nitrons and inspired more confidence. But, this could be attributable to other suspension differences between the two cars. Both cars have/had V2 arms with max camber, titan quick rack, DS brace with toe-pins, stiffer ARB, and lighter rotors than stock.
The Bilsteins are more compliant over broken pavement and offer an over all better ride quality when cruising. The Nitrons are harsh and lack refinement on the road but perform well on the track...understandably so. Nitron singles are track dampers.
-The more I drive the Exige with the Bilsteins the more I have grown to understand the philosophy behind the engineering of a softer suspension that
intentionally induces lost of body roll. I don't like excessive body roll because quick direction changes are less precise and an unsettle the car as opposed to a high spring rate damper. Bilstein track pack has 271/371 rates....VERY soft even for such a light car...
-Robert