I know nothing about sewing machines, but I do know brakes. Rotors, pads, wheel cylinders, master cylinders, etc. My husband is an engineer that designs machines and components. He has worked in the same factory doing this for 18 years. All the brands from the cheapest to the "performance" brakes come off the same machines and assembly line. "High end" brakes generally get a nicer paint job and a prettier box. There is no other difference.