Add custom css to a page template in wordpress

Question

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Hi i need some help with the creation of a custom css file for my page template. There are many topics out there regarding this issue but with each thread i read i get mo

Answer 1

How about this one?

 function my_custom_styles() {

    wp_register_style( 'custom-styles', get_template_directory_uri().'/lib/styles/custom-styles.css' ) );

    if ( is_home ) {

    wp_enqueue_style( 'custom-styles' );
    }
 }

 add_action( 'wp_enqueue_scripts', 'my_custom_styles' );

I have tested all three answers from here; and all of them works great. Does anybody know which one is faster & better?