When comparing Semantic UI vs Topcoat, the Slant community recommends Semantic UI for most people. In the question“What are the best minimal CSS frameworks?” Semantic UI is ranked 9th while Topcoat is ranked 14th. The most important reason people chose Semantic UI is:
Ranked in these QuestionsQuestion Ranking
Pro Load only the components you need
Pro The elements offer a huge amount of customization, far beyond a framework like bootstrap.
Pro It's semantic
Uses semantic class names for its styling, making it easier to grasp and understand even for beginners looking to jump right in.
Pro Beautifully designed
Semantic UI has a futuristic and beautiful design. Many will satisfied with the design, especially when Semantic UI is used as a CSS framework.
Pro It'll have almost any UI component/element you may think of for your project
It includes tons of UI components that you may need for almost any type of project you may work on; And of course, you can always only pick what you need.
Pro Well documented
The documentation is easy to use, well written and has lots of examples each with their source codes.
Pro Easy to use
Pro Focused on performance
Every Topcoat component is built with performance in mind. Most of the stylesheets are small and do not take too long to load.
Con Very large file size
Packages are much bigger when comparing to Twitter Bootstrap or Zurb Foundation. Semantic UI is really extremely large and it would be better to use specific modules and components, rather than the whole thing.
Contains a lot of UI inaccuracies, like wrong positioning, cannot mix classes, etc.
Con Small number of classes
Once you wanna do something that is not mentioned in the doc - prepare to spend an hour, then give up and implement a custom "workaround".
Con Not so impressive design
But it is themeable.
Con Some issues with typography
For some components the text size is quite small, while for others it's too light over a light background, making the text harder to read.