The difference between a German-style hose clamp and an American-style hose clamp

The difference between a German-style hose and an American-style hose clamp:

The thread on the steel belt of the German hose clamp is concave and convex, while the thread of the steel strip on the American hose clamp is perforated;
The steel belt width of the German hose clamp is 9mm and 12mm, the steel belt width of the American hose clamp is 12.7mm, and the steel belt width of the small American hose clamp is 8mm
The hexagonal head of the screw head of the German-style hose clamp is 7mm, while the American-style one is 8mm;
The torque of the German-style hose clamp is a little higher than that of the American-style pipe