Looks the same to me, tiny changes in angel and lighting can make a huge difference so it's hard to judge
He looks like he's on steroids in the second pic, but I know he's a clean fighter so it's probably the lighting and angle. Plus he's a bit tanner in the second pic. All these factors can lead to the appearance of more muscle mass and vascularity.
Well one thing I notice immediately is that his veins are no longer popping through But you are right.