Pimsleur: Publishers and Variants

[Speakeasy]

I have come across yet another publisher of the Pimsleur courses, this time by "SyberVision" a company that is perhaps better known for their more esoteric self-improvement products: (http://www.ebay.ca/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR1.TRC0.A0.H0.TRS0&_nkw=Sybervision+&_sacat=0). Would anyone know whether or not the SyberVision variants differed from what-came-to-be the Simon & Schuster variants and, if so, to what extent?