Schema compare's two best features are the ability to customize and share comparison files and run comparisons via command line, so they can be integrated into your pipeline. We use it to make our schema changes part of our source code and deploy along side code changes. Review collected by and hosted on G2.com.
The diff viewer in Schema compare is not intuitive. Once you look at it, it makes sense, but the highlights of additions/removals don't really translate well to the directional sync view the application uses. Review collected by and hosted on G2.com.