how to use a different editor for comments

Just in that moment i found a suitable solution for me – this comes to functions.php of child-theme:

add_filter('avia_form_tag_output','avia_form_tag_output',10,1);
function avia_form_tag_output($output){
    $args=array(
      'orderby'    => 'count',
      'order'    => 'DESC',
      'hide_empty' => false,
     );
    $tag_terms=get_terms('avia-question_tag', $args ) ;
    $output='<select name="question-tag" id="question-tag" class="postform">';
    $output.='<option value="">Select question Tags</option>';
    foreach($tag_terms as $tag_term)
      $output.='<option value="'.$tag_term->name.'">'.$tag_term->name.'</option>';
    $output.='</select>';
  return $output;
}

add_filter( 'comment_form_field_comment', 'comment_editor' );

function comment_editor() {
  global $post;

  ob_start();

  wp_editor( '', 'comment', array(
    'textarea_rows' => 15,
    'teeny' => true,
    'quicktags' => false,
    'media_buttons' => false
  ) );

  $editor = ob_get_contents();

  ob_end_clean();

  //make sure comment media is attached to parent post
  $editor = str_replace( 'post_id=0', 'post_id='.get_the_ID(), $editor );

  return $editor;
}

// wp_editor doesn't work when clicking reply. Here is the fix.
add_action( 'wp_enqueue_scripts', '__THEME_PREFIX__scripts' );
function __THEME_PREFIX__scripts() {
    wp_enqueue_script('jquery');
}
add_filter( 'comment_reply_link', '__THEME_PREFIX__comment_reply_link' );
function __THEME_PREFIX__comment_reply_link($link) {
    return str_replace( 'onclick=', 'data-onclick=', $link );
}
add_action( 'wp_head', '__THEME_PREFIX__wp_head' );
function __THEME_PREFIX__wp_head() {
?>
<script type="text/javascript">
  jQuery(function($){
    $('.comment-reply-link').click(function(e){
      e.preventDefault();
      var args = $(this).data('onclick');
      args = args.replace(/.*\(|\)/gi, '').replace(/\"|\s+/g, '');
      args = args.split(',');
      tinymce.EditorManager.execCommand('mceRemoveEditor', true, 'comment');
      addComment.moveForm.apply( addComment, args );
      tinymce.EditorManager.execCommand('mceAddEditor', true, 'comment');
    });
  });
</script>
<?php 
}

by the way you can decide which buttons of tinyMCE are active for that case:
you only have to edit the tinyMCE details in the code above like:

wp_editor( '', 'comment', array(
    'textarea_rows' => 15,
    'teeny' => true,
    'quicktags' => false,
    'media_buttons' => false,
    'tinymce' => array(
    'toolbar1' => 'formatselect | bold italic strikethrough | alignleft aligncenter alignright alignjustify  | numlist bullist outdent indent ',
    'toolbar2'=>false
  ),
  ) );

with this options it will look like this:

see here f.e. how to style: https://www.tiny.cloud/docs/demo/full-featured/