Which company is the Lexus and which one is the Toyota? I've read reviews which claim opposite of each other. Going strictly by price, the Z6i retails for more than the K16i. But...which product is the better one, optically, durability-wise, etc. I used to think it was the same assembly, but the K16i has a larger FOV than the Z6i, so SOMETHING is actually physically different inside that thar tube!