Aha, crazy what you can find at the companys web site eh?
"SPORT (S)
For the performance-minded driver, Bilstein “Sport” shocks deliver absolute mastery of the road surface.
Designed to push a car’s suspension to it’s performance peak, these shocks are well suited for use with special springs, antisway
bars or other suspension upgrades.
HEAVY DUTY (HD)
For most vehicles including full-size sedans, SUVs and trucks. These shocks provide improved handling and stability without
sacrificing ride comfort. They offer super damping ability that makes them ideal for heavy hauling for occasional off-road use,
while maintaining an exceptional “street” ride."
I think the setup that I posted a link to is perfect for me. I'm not gonna be racing the damn thing, she's my daily driver. I just want a stiffer, sportier feel.