If you're looking at drop springs, there may be some differences between the models. Sometimes the strut pickup points may be the same on similar chassis, but the struts themselves may not be the same. So, it's possible that if you're buying an integrated coilover assembly, which replaces everything (strut and spring) it might go on all trim levels in a certain chassis. If you're just buying springs, a spring for one trim level might not fit another because of strut differences. Higher performance models often have bigger struts, shorter struts, different strut tops, inverted struts, stuff like that. This may not apply on your car, but it is fairly common. Honda/Acura stuff is pretty interchangeable, but the rule of thumb is that if you go to a few vendor sites and only see one trim level listed, there's probably a reason. Go to the spring manufacturers sites, and see if they have different listings for the different trim levels..