Extending its existing iPhone 4 product line to the iPad 2, Zenus has introduced two new folio-style cases: a faux-leather model called Masstige ($70), and the real cowhide Prestige ($100). While the materials differ, both cases have the same fit and functionality. The iPad 2 fits securely into a hard-reinforced back shell, though there is a noticeable gap around the edges, and the opening for the speaker is a little on the high side while the camera…