Case is athletic, calm, solid fundamentals, well-rounded. I think he's a really solid young fighter and dangerous everywhere. And a smart fighter, too. Uses a jab well. Uses a variety of kicks. He's just smooth and poised. Has some defensive issues at times, but he's generally bright and reads the fight well. Also makes himself long, which Matthews will struggle with IMO.
Matthews will be a lot shorter (fights small), he's still green, he panics when things don't go his way. He's explosive, but susceptible to stupid stuff here and there. I haven't seen much fight IQ from him. I think Case and his length & fundamentals will be difficult for Matthews.
Matthews was choked out by Vick from sidecontrol. He was very, very close to being finished by Arreola. He wings his shot, darts in with his head down hoping to land a hook, telegraphs a lot of his movement. He's so athletic that he gets away with it against slower (Vick) or subpar (Rocha) competition, but against a solid, smart fighter, he really gets exposed.
I think Matthews looks to get this to the mat, but Case already demonstrated solid defensive ground skills versus Cabral. Matthews also has poor td technique, muscling his opponents to the ground rather than using technique. Leaves his arm or head exposed at times. He's young, so this can be corrected, but he's consistently made these kinds of mistakes. As mentioned, he wings shots using pure upper body. Even if he's in good shape, in a tough fight he'll gas. Little defense in the standup. Rushes in for his combinations, doesn't utilise reach advantage (or any reach to speak of). I view Matthews as a more reliable Erick Silva: great athlete, explosive, raw. Oh, and I suspect Matthews will have a speed advantage, but that will be negated by Case's superior fight IQ, timing, technique.