The dolls developed in Japan are now known as SD dolls, and BJD is translated into Chinese as "spherical joint humanoid". Although the two kinds of dolls are very similar in appearance and clothing, they are also different. BJD includes SD, but BJD is not just a brand of SD. Just as "comics" is a general term, "girl comics" is just one of the categories of comics. BJD has many brands at home and abroad.

BJD dolls are always considered as SD dolls by many people because their images are similar. Due to the success of SD dolls, their popular shapes and attractive clothes, now SD dolls have become the template of BJD dolls.