The elbow belongs to the joint part of the pig's hoof and the supporting arm connection, while the pig's hoof is the pig standing and walking with the ground in contact with the limbs hooves. Pig's hooves and elbows are connected together, but they belong to different parts, and the meat texture is different.
The pork elbow has a lot of meat, lean and elastic, while the pig's hoof has less meat, more tendons, and tight skin.