没有真正了解你的主要问题。。您是否尝试比较两种帖子类型并将其显示在页面模板中？或者您是否尝试将当前页面与选定的帖子类型进行比较？

尝试创建页面模板

<?php
/*
 * Template Name: Compare
 */
?>

<?php
get_header();   
?>


        <form id="customsearch" action="" method="post">
            <select name="compare-one" id="compare-one">
                <option value="130">1</option>
                <option value="102">2</option>
            </select>

            <select name="compare-two" id="compare-two">
                <option value="130">1</option>
                <option value="102">2</option>
            </select>

</form>
<script type="text/javascript">
        $(document).ready(function() {  
            $(\'#compare-one\').change(function() {
                var compareone_value = $(\'#compare-one\').val();
                var data = {
                    \'action\':\'callback_function\',
                    \'compare-one\':compareone_value, 
                };
                $.post(ajax_object.ajaxurl, data, function(response) {
                    $(\'#compare-one-container\').html(response); 
                });
            });

            $(\'#compare-two\').change(function() {
                var comparetwo_value = $(\'#compare-two\').val();
                var data = {
                    \'action\':\'callback_function\',
                    \'compare-two\':comparetwo_value, 
                };
                $.post(ajax_object.ajaxurl, data, function(response) {
                    $(\'#compare-two-container\').html(response); 
                });
            });

        });
</script>              
<div id="compare-container">
    <div id="compare-one-container">

    </div>

    <div id="compare-two-container">

    </div>

</div>

<?php get_footer(); ?>

add_action(\'wp_ajax_callback_function\', \'callback_function\');
add_action(\'wp_ajax_nopriv_callback_function\', \'callback_function\'); // for not logged in user
function callback_function() {
if (isset($_POST[\'compare-one\']) || isset($_POST[\'compare-two\'])) {
            $arr_id = array($_POST[\'compare-one\'],$_POST[\'compare-two\']);
            $temp = $wp_query;
            $wp_query = null;
            $wp_query = new WP_Query();

            $wp_query->query(array(\'post_type\' => \'listing\', \'posts_per_page\' => 2, \'post__in\' => $arr_id));
            while ($wp_query->have_posts()) : $wp_query->the_post();
                $custom = get_post_custom($post->ID);
                $beds = $custom[\'_beds\'][0];
                $baths = $custom[\'_baths\'][0];
                apply_filters(\'the_title\', the_title());
                apply_filters(\'the_content\', the_content());
            endwhile;
            $wp_query = null; $wp_query = $temp;
            rewind_posts();

    }
    die();
}
?>

wp_enqueue_script( \'ajax-script\', \'ajax_object\', array(\'jquery\'));
    wp_localize_script( \'ajax-script\', \'ajax_object\', array( \'ajaxurl\' => admin_url( \'admin-ajax.php\' ) ) ); // setting