This is a clash between an aggressive brawler and a technical tactician. Pitbull Cruz’s relentless style seems tailor-made to challenge Lamont Roach’s counter-punching approach. However, I believe Roach will struggle to break through Cruz’s tight defense—especially considering Cruz’s granite chin, which was on full display in his war against Tank Davis. Davis himself had a tough time putting Cruz away, and Roach might face similar difficulties. All in all, this shapes up to be a compelling and unpredictable matchup.
Is Lamont Roach known to be a power puncher? I'm not sure about it, but maybe the added weight on him going at 140 lbs might give him that strength and power to hit Cruz chin. But as you have said, he has a granite chin and that could hold against the power of Roach.
So this in paper could be 50/50, aggressive style with granite chin against a technical fighter. For that, I will agree that it's going to be unpredictable, but with Roach moving up for the first time, it might give him a problem in later rounds unless he turns out to be a 'Crawford' and looks amazing at his new weight class.