Answer: The cartilage is different in nature and they are used for different things. The ear cartilage tends to be thinner and may have a certain curve depending on where you take the cartilage from. Therefore, it is good for using for certain things. The nasal cartilage can be quite thick and strong. It is very good for supporting the structure. In general and in most cases, there is more septal cartilage that can be harvested; however, sometimes, the cartilage can be harvested from both ears.