He gave Nunn a hell of a fight at middleweight...I think he would probably beat Fernando aswell but not so sure about stopping him.
Given his performance against Winky Wright you've got to give Vargas a decent chance in this one. I'd probably still favour Starling but I think it would be quite close. Vargas is probably a little too hittable to outpoint Starling, but if Mooch does take his foot off the pedal and let's his mind wander once he gets a lead, Nando might claw his way back in the fight.
Vargas wins a nailbiter over Starling, who skills should carry over into 154, but would be a question mark turned into a negative.