It's basically the same, minus a few differences in syntax.

ie. Mixins

LESS

    .border-radius(@radius){ border-radius: @radius; }
    .border-radius(5px);

SCSS/SASS

    @mixin border-radius(@radius){ border-radius: @radius; }
    @include border-radius(5px);

- - -

The biggest difference is being able remove curly braces and semi-colons, which can speed up your development

    h1
      font-weight: bold
      color: red