This is Checkmate for Team Senku.
Xeno is captured/dead. So there's not gonna be any negotiations since Xeno lost.
While Zeno does have hostages from the ship, he doesn't have the leader (Senku)
Therefore, Senku won this "science battle"
But of course I don't think Senku will kill Xeno. Maybe Stanley, but not Xeno. Or both, if he kills both, then the whole Kingdom Of Xeno falls because Xeno doesn't have a person like Chrome on his side. He may have a black Kaseki, but Xeno doesn't have a rock loving idiot.