Hello guys, I bought two Speck Pixelskin HD cases for my iP5S. Both are graphite gray color. What surprised me, is the fact they came with different initial numbers. The first one is SPK-1582, the second -SPK-0668... They look a bit different too, comparing next to each other. SPK-0668 looks more soft rubber, while SPK-1582 is a bit harder. Also SPK-0668 has two holes on one of the sides, which I've never seen before on Speck cases: The buttons on SPK-0668 are not as tactile as on SPK-1582, they are hard to press. The packing of both is different also: SPK-1582: SPK-0668: Do you think they both are authentic Speck products?