I had a BB720. Beast of a mower. I used it to clear some very rough land and cut trails through my woods. I cut many logs and trees larger than 4". I was hard on it and it held up pretty well. I did finally break the stump jumper, but again, I was doing stuff with it that I shouldn't have.
I now have a Bush Hog 297. This is an excellent mower also. Really, the same quality or slightly higher in my opinion. There are little design aspects that show through. Woods has updated their newer models to match some of these features. The biggest one is the three point hook up. Older Woods had a single ear that was easy to bend. The newer models and the Bush Hog have the two piece ear that supports the pin on both sides of the three point lift arm. Since I did all the hard work with the Woods, this mower has a much easier life.
I would buy either again and probably make my decision based on price.