Yes, something different in how valet key is cut, I presume to preclude a valet from searching glove box and trunk for valuable's. I'm guessing, but don't know, that a valet key cannot be recut (remove material) to open both ignition and trunk. That is, the valet key is missing material, so even making an impression still leave's a difficult problem in cutting anew a bunch of keys made from a valet impression and probabilistically finding one that works (a large # of keys). I'm no locksmith, this is just my guess.