Node SASS vs Dart SASS. Which is more productive under what conditions?

Question

css

It became interesting which SASS ->CSS compiler is more productive and which one is more suitable for me in the project.
At the moment I'm using the default gulp-sass

Task code in gulpfile:

gulp.task('styles', function() {
    return gulp.src('app/sass/main.sass')
        .pipe(sass().on('error', sass.logError))
        .pipe(concat('style.css'))
        .pipe(gulp.dest('app/css'))
        .pipe(browserSync.reload({ stream: true }))
});

The plugin page talks about node sass and dart sass.
And also, by interest, I entered a search by popularity for the query "sass" and got more popular options.
For example

1. sass-loader
   
2. sass
   

In general my questions are:

1. What's the difference between Node Sass and Dart sass?
   
2. What is more productive? Yes, I know that there are microseconds, but it's still nicer to use a faster option.
   
3. Why are other plugins (listed above) more popular than grunt and gulp sass?
   

Answer 1

1. dart-sass - reference implementation of the language i.e. is an example of how the language should work. node-sass binding libsass ( C++ language specification implementations ) to node.js.
   dart-sass contains all the latest features of the language, for example, there is already support for sass modules , libsass lags behind, and node-sass lags behind libsass. For proof - here and here
   
2. libsass is more productive, in some places - significantly. For example, in my tests, intensive work with sass maps in libsass is about 10 times faster than in dart sass. As for microseconds - I have projects that take 15-20 seconds to compile only styles on node-sass, everything is much slower on dart-sass
   
3. The references given are a comparison of warm with soft. There are implementations of languages, and there are plugins for connecting them to various collectors. sass - language implementation itself, gulp-sass - binding for Gulp, sass-loader - binding for Webpack
   

Answer 2

Why rewrite Sass?