Within a short time frame, I had the opportunity to compare stock non-sport, Eibach Prokit, and H&R Sport springs, all with Bilstein Sport shocks. Here are my thoughts.

Comments: When I first "upgraded" I went from stock to the Eibach Prokit springs. I got matched Bilstein shocks, since Eibach doesn't have a shock application for fronttrak. I immediately noticed reduced squat and dive, and felt like I could corner harder, but still had tons of body roll. The Eibachs lowered the car MUCH more than advertised, probably close to 2" front and rear. It looked great, with about 2 fingers of gap tire-to-fender arch front and rear.

Soon thereafter, I had other problems (the fender rubbing issues that are all over the forums from people with Eibach / Bilstein) and decided to try the H&R sports instead.

They immediately felt stiffer, but still comfortable for daily driving. Squat and dive are again reduced, but so is body roll in cornering. The gap went up to about 2.5 fingers, but still looks sharp and sporty low. Bumps are rougher, but not unpleasant. Due to my wheels, I still rolled my fenders to remove that last bit of rub, but most people don't seem to have this problem.

So what does my experience really mean:

1) The Eibachs are just as low, or lower, than the H&R's.
2) The Eibachs are softer than cars with OEM Sport in ride.
3) The H&Rs are stiffer than OEM sport.
4) The softness and low ride of the Eibachs appear to make them prone to fender rubbing.

I actually liked the ride with both, but I like the ride better with the H&R's because it isn't just "stiffer-but-still-soft" handling, but truly sportier. Casual drivers that want a better look will like the Eibachs, sportier, more aggressive drivers will want the feel of the H&Rs.