$projects = get_field( 'display_featured_projects');
if ($projects) {
foreach ($projects as $post) {
setup_postdata($post);
$post_type = get_post_type($post);
if ($post_type == 'custom_post_type_one') {
// do this
} else {
// do that
}
} // end foreach
wp_reset_postdata();
} end if projects