No difference. According to the query Baidu encyclopedia information shows that the king of razor clams is a variety of razor clams, also known as bamboo razor clams, the shell is long, thin and brittle, two pieces of the embrace into a bamboo tube, razor clams for mollusks, the mesocarp two fans, the shape of a narrow and long, the outside of the egg-yellow color, the inside of the white, so the king of razor clams and razor clams there is no difference.