When comparing Galaxy vs Material UI, the Slant community recommends Material UI for most people. In the question“What is the best CSS framework?” Material UI is ranked 8th while Galaxy is ranked 43rd. The most important reason people chose Material UI is:
Really nice implementation so far
Ranked in these QuestionsQuestion Ranking
Pros
Pro Fast and lightweight
Galaxy uses CSS animations and rarely relies on Javascript (2kb). It's about 1/67th the size of Bootstrap.
Pro Beautiful
More modern UI than traditional frameworks like Bootstrap.
Pro Semantic markup
Using the custom attribute g, it's very easy to scale and maintain.
Pro Adheres really well to the material design standard
Really nice implementation so far
Pro Perfect for React projects
Really convenient and easy to use components
Cons
Con Active development means API changes are frequent
Might be a problem for large projects, but since active development is a good thing, you should consider this rather mild inconvenience weighed against the benefits.