He is a little bit similar too breazeale in the way that you need to have good defense and toughness to overcome him.
He is a big guy who will come at you for 12 rounds so you should be mentally prepared for that.
Still, his defense looks garbage and he looks uncoordinated with follow up punches, a good counterpuncher could do big damage with him.
His footwork is slow and he eats a lot of shots coming forward.
He's got brute strength, but I doubt he would get his paws on someone like Fury, Joshua, or Wilder.
It's good that you brought up Big Baby because Jarrell Miller vs. Adam Kownacki would be a great test.
He seems like a smaller Arreola. Not necessarily because of his physique, but the way he throws and moves. With the right opponents he can give some good fights, but a good like Wilder will eat him alive.