Hi, Erica! The more expensive a cybernetic or augment is, the more refined its components will be: carbon fibers, titanium, silver, and diamond. For the less expensive and cobbled together cybernetics of the lower classes, they are composed of metals that are more basic, like steel.

In the same vein, robotics that are government property will be composed of refined materials, while the robotics of the poorer classes will be simpler.