Diamondhead might be stronger than Ripjaws, but Ripjaws has several other qualities that, when combined with Diamondhead's sheer strength, lead to a great combination of powers. Firstly, Diamondhead's brute force is now tied together with Ripjaws' agility and speed, allowing him to be a deadly foe when in water. Unfortunately, Diamondjaws does come with the drawback of needing water to survive, so he won't be of much use on land. Secondly, Diamondjaws retains the ability of crystallokinesis, allowing him to create and manipulate crystalline objects that can help him when fighting underwater. Thirdly, the large and powerful jaw that is usually associated with Ripjaws is now even more strong and durable thanks to Petrosapien DNA, meaning his bite is stronger than ever. And of course, lastly, Diamondjaws is able to utilize Diamondhead's new obsidian armor, allowing him to coat the top of his head in a durable shield. Unfortunately, this also covers his neck gills, meaning if his torso is covered in any way during this - he'll suffocate.