$updatedPostId= wp_update_post(
    array(
        'ID' => $thisId,
        'post_title' => $newTitle
    )
);

if(
    ($newTitle!='')&&
    (strcmp($newTitle, get_the_title($thisId))!=0)
)

Eg:
    From 3rd party:  Arnold Iron Whey [2 LBS] [Cookies & Cream]
    From Wordpress:  Arnold Iron Whey [2 LBS] [Cookies & Cream]

(Note: My text editor highlights the ampersand and the space immediately after it
in the 3rd-party product name but not in the one from Wordpress)