Yes, there is a difference between sport and supersport. Supersport is stiffer. As I said above, H&R doesn't seem to publish spring rates.
Eibachs give you a drop of about an inch, that is how they are designed. "OEM rate lowering springs" are not performance oriented, they are "tuner" garbage. They are for appearance, not for function. Eibachs and Racing Beat are performance oriented springs, offering small rate increases and only about an inch drop because that is what works.
You can't drop the car two inches on OEM rate springs and expect it to ride good. You need to use higher spring rates to compensate for loss of suspension travel. Once again, if you don't, you are on the stops all the time. There are work-arounds for this, but unfortunately they don't seem to be available for this car. So, you need to compromise and work with what the aftermarket gives you. You can drop the car into the weeds and ride like a truck, but you'll look cool.:rice 1:
Or, you can leave it at a reasonable height and have a car that rides and handles better than stock. Not as cool, but then again neither is high centering on a speed bump. :shocked013: