1. Regional differences: Shuxiang Cao Shi Duck Neck is a brand originated from Hunan and Sichuan, and Chengdu Cao Shi Duck Neck is a local brand in Chengdu.
2. Flavor difference: Shuxiang Cao Shi duck neck is famous for its spicy and delicious flavor, while Chengdu Cao Shi duck neck is famous for its sauce and salty flavor.