In terms of basic attribute values, Human crossbowmen showed no improvement over archers, yet their recruitment cost increased from 50 to 80 gold. The additional 30 gold in cost was entirely for their talent.
The talent of Human Fourth Order crossbowmen was Armor Piercing; as the name suggests, the bolts they shot had greater penetration against armor. When equipped with the Chui Chui-improved military crossbows Yan Xing had prepared, their lethality against heavily armored units was further enhanced.