Michigan can run a pretty unstoppable 2 man game with their 4-5. I don't love their guards, and I think teams will have hot nights where they shoot them out of the arena. But having two bigs, including a true 5, like that, when most teams don't anymore, is going to cause a lot of problems.
Cal is just going to keep rolling the ball out, and hoping to out talent you, and often enough, he does. But on the whole, Arkansas will lack any sort of consistency, IMO