What is the difference (advantage) of material-ui and materializecss when used with React?

Question

React

www.material-ui.com - https://github.com/callemall/material-ui
materializecss.com - https://github.com/Dogfalo/materialize

Answer 1

The difference is that material-ui is a set of ready-made components for react, and materializecss, judging by the wiki, is just a set of styles.

Answer 2

The difference is in the development teams (sarcasm, they are probably different somewhere in the code).
Advantages: no need to write css code to implement design in material style