Iirc the stiffer S5 chassis and arbs allow for a softer ride setup.
The factory settings aren't quite right. It's a little pointy, and the spring/damper setup can get confused on fast, bumpy roads.
Shooter's investment with Richard Thorne showed that traction could be significantly improved. (He kindly shared some extracts from their report). I hear that the factory didn't spend quite enough time finessing the standard setup. I thought RT's price for fitting the adjustable setup with right-sized arbs was very reasonable.
My S5 is on 18 inch wheels, which will probably become next year's winter fitting after the car sprouts some 19s. Maybe the softer sidewalls of the 18s mask the imperfections of the setup, which 19s highlight?
Having said all that, I've not driven an S3 for comparison.
Will
