Although Galindez would likely be the most well-rounded fighter Saad ever fought, I think Saad has proven he can handle fighters that were more skilled (i.e.: Conteh) and more ferocious (Johnson). Conversely, I think Galindez is far less proven against fighters with the kind of firepower Saad has. I'd favor Saad by stoppage circa. 10 rounds.
If it's the Galindez who fought like a man possessed in the first Kates fight, I give him an excellent chance. Although, gun to my head, I still side with Saad. Of all the scenarios I can envision here, the prevailing scenario I see is Saad pulling it out the fire and stopping Galindez circa 12-13.
