node-sass may be faster than dart-sass, but as of writing this dart-sass is the only library which implements the @use rule, which is strongly recommended over @import. According to the official sass-lang website:

Dart Sass has replaced Ruby Sass as the canonical implementation of the Sass language.

Dart Sass is the primary implementation of Sass, which means it gets new features before any other implementation. It’s fast, easy to install, and it compiles to pure JavaScript which makes it easy to integrate into modern web development workflows.