I wouldn't say any worse about getting cut than the next dog. The only problem I have had is attempting to catch a smaller boar with an above average grill.
I would guess they typically will attempt to catch anything 150 lbs or smaller.
I have an area I hunt that produces lots of 150 lb hogs with 2-3" teeth. That same place a friend trapped a 130 lb boar with 3 1/8" cutters last month.....and there seems to be an abundance of those.
It's prob not correct to say all Jagds are rough. I have two that are rougher than the other two but will all catch a less aggressive or weak hog.