Both offerings have a similar multi-layer construction: a polycarbonate shell with built in passthrough screen protector and a thick silicone skin that fits over it, with a removable belt clip for each. The first layer is rather similar on both, with a two piece snap-shut design. On the inside of each back piece is a thin padding to cushion the iPhone 4, and each has extruded portions which serve to hold the silicone layer in place. Between the two,…