I found some more info. The KHK Skyscraper is a rebranded Widow NG Special with an extra tail. The Widow NG Special Edition as compared to the regular Widow NG has a sail with fewer panels/less stitching, non-removable or less adjustable weights, and lower grade/more stretchy spectra lines. The frame is supposedly identical. The difference in the lines may explain the mushyness reported by Tim P. above. It was built to meet a lower price point, and while the differences are small, there are some differences.