BA solo comercializa dos packs de Soundware, el XS y el S (sub y altavoces más grandes). Los dos que mencionas son el XS y son exactamente iguales. Es más, si miras la descripción del MKII de Amazón verás que hablan del Soundware XS continuamente:

Product Description

Product Description

The SoundWare XS 5.1 Loudspeaker System is an ultra-compact 5.1 speaker system that brings a new level of style and substance to the fast-growing surround sound home entertainment category. It allows users to enjoy rich, room-filling surround sound with their home entertainment systems, while complementing virtually any décor in a stylish yet subtle (even virtually unnoticeable, if desired) manner. The system’s five ultra-compact and stylish SoundWare XS satellites are real two-way speakers (unlike many competitors). Each features a high-performance 21⁄2-inch (64mm) woofer and a 1⁄2-inch (13mm) tweeter. The contoured-rectangle subwoofer, colored to match the satellites in either black or white, features a 100-watt (250 watts peak) amplifier and 8-inch (203mm) driver. Wall brackets are included for easy installation of all five satellite speakers.