It's not that far from the last weight division where Casimero became a champ, he can still move the same and his fighting skills especially his speed is still applicable though the opponents strength might be tougher from this new weight but proper adjustments and enough trainings and sparring may let Casimero to stand out and bring the win.
Casimero always put a lot of efforts on the training when it comes there's a new opponent. Wherein he always push his limit. so for me it's not surprising that despite of the record of the opponent he can win and knock it out.. This will be more interesting to watch tbh.