What makes a BX mow so much better than a B?
Since I've owned both I feel I can fairly comment. The BX is simply more agile to zip around objects and trees. The BX also is available with a more economical engine, the 18 HP. You don't even need that much power to mow. If I was mowing a perfectly flat piece big lawn with the same mower deck the saving in fuel would be the advantage of the BX. If however the length of the lawn is significant having the cruise control on the B gives the B a point up in my books. If the lawn is rough and bumpy, like mine, the bigger wheels on the B make for a smoother ride. You just need to know what your situation is to pick the best one. They are both great.