TextStyle.merge and TextStyle.copyWith have different description but I seem to get the same result.
If merge behaves same as copyWith,then there is no need for adding the method merge to TextStyle.Are there any differences between them?

class TestView extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    const baseStyle = TextStyle(color: Colors.blue, fontSize: 16);
    final titleStyle = baseStyle.copyWith(
      color: Colors.red,
      decoration: TextDecoration.lineThrough,
    ); // copyWith
    final noticeStyle = baseStyle.merge(const TextStyle(
      color: Colors.grey,
      decoration: TextDecoration.lineThrough,
    )); // merge
    return Column(
      children: [
        Text('this is title style', style: titleStyle),
        Text('this is notice style', style: noticeStyle),
      ],
    );
  }
}