get_the_terms with variable

I have the following two functions that I would like to combine into one, to where I would pass in which term(name, slug, etc) I want to get out.

function get_rug_terms_name($term) {
    $terms = get_the_terms( get_the_ID(), $term);
    if( !empty($terms) ) {
      return implode(", ", array_map(function(WP_Term $term){
        return $term->name;
      }, $terms));
    }
  }

  function get_rug_terms_slug($term) {
    $terms = get_the_terms( get_the_ID(), $term);
    if( !empty($terms) ) {
      return implode(", ", array_map(function(WP_Term $term){
        return $term->slug;
      }, $terms));
    }
  }

I was thinking something like:

function get_rug_terms($term, $which_term)

and then return $term->$which_term;
but that doesn’t seem to work. Feel like i am probably close, but just not quite getting it.

Any help would be great!!!