Carrozzeria is just a hype. Its Pioneer cater for Japan domestic market nothing special. Ppl are selling way overpriced for used item.
DD-Linear is Alpine's range of speaker mainly for JDM market. For component speaker, its midbass is weaker than the common Alpine S or R series stuffs but higher clarity due to better tweeter. Thats the more common Japanese preference. The rest of the world especially western countries prefer warmer sound thus higher power handling and better midbass on components, reducing piercing highs from tweeter.