Suomalainen Sika (or something like that)

Who knew? Apropos of an agriculture-cooperation agreement between Finland and China, we find out that "the quality of Finnish pigs is known around the world. Hogs exported from Finland and their descendants are ranked highest in American studies."

What, I wonder, are the criteria for that study? Leanness? Snufflability? Curliness of the tail?The mud-adhesion properties of the porcine epidermis?