The scapula or shoulder blade of Xuanhuaceratops has an acromion that is placed more distal than the shoulder joint, while that of Chaoyangsaurus is on a level with the joint.
The position of the acromion differs between Xuanhuaceratops and Chaoyangsaurus, with Xuanhuaceratops having it further down from the shoulder joint, whereas Chaoyangsaurus has it at the same level as the joint.