Difference between Gates Polytron and h td belts

The differences are as follows:

Gates PolyStrong is suitable for all industrial markets, and is especially suited to replace chain drive applications.

htd belts are adapted to a very wide range of applications, including data storage devices, power tools, postal logistics equipment, the food industry, office equipment, centrifuges, money counting machines, medical equipment, sewing machines, ticketing machines, robotic arms, vending machines and vacuum cleaners.