What is the difference between gem bootstrap-sass and gem twitter-bootstrap-rails [closed]
The first one is a translation of bootstrap less files to sass files. To integrate it you have to copy those files to your project. To update it you have to copy new version of those files again.
Second uses less and it is a gem that provides some additional functionality like generators. Integration is done through bundler and further updates also.
I prefer first solution. It's easier to keep control. It's also less magical so integration is simpler and less bug aware.
Here is a nice comparison and explanation of available bootstrap solutions for rails.