The HD's are stiffer but are more for vehicles at full ride height. The Sports are similar to the HD's but are for lowered vehicles. Neither will really feel like OEM shocks. If you want sportier handling with OEM ride quality you should consider a conversion to Sportline suspension parts. We offer such conversions through PartsShop. We can hook you up with individual bits or a 100% conversion to OEM Sportline pieces.
Just an idea...Lee