All of the SW I have seen are super productive and seem to be more "dwarfish" than the Makok. The one drawback, ok, actually two drawbacks are (other than I am not fond of the small fruited Saps...would much prefer a Morena, Hasya, Ox, Ofour, Excalibur, Alano, etc.):
1. - similar to Jenn's comment, it has much less of that brown sugar flavor; I refer to it as a :white sugar pear" whereas most to all others can be coined "brown sugar pear".
2. - the SW branches seem to be more brittle; I have seen a number of branches overloaded by the fruit (again, a smaller fruit), snap from the weight of the fruit.