The AEM EMS isn't even an AEM product. They just purchased some other company that produced a standalone system and began marketing it under the AEM name. ProTuning or something?

Regardless, you're in the same boat with either system. the only thing the AEM unit has in its favor is that it is plug and play for **some** cars, but not ours, leaving the decision purely to aethetics. Frankly, Electromotive has been doing this a lot longer than AEM has, and i would be more apt to trust them.