If you're looking for good MPG, the GXP isn't bad if you do a lot of highway driving, I get around 25-28 highway usually. However city mileage is ****ty. In my GTP I got much better mileage in the city, and 26-30 highway. My GXP however looks nicer than my GTP and sounds much cooler. But honestly after having the GXP for a while now, I don't really care about the difference in the interior, there's not that much. I like the GTP's hvac more than the digital one on the GXP, I have the same 6 disk stereo, but with XM that I don't use, and the seats just look cooler and are more of a bragging rights thing imo.
