The BMW is a highly specialized alternative to the X5. BMW stylists replaced the wagon-like backend and third row seat with a sharply raked fastback profile. The result defies categorization. The X6 has the all-wheel-drive and tall stance of an SUV, but little of the utility. Inside there is seating for up to five and a shallow storage area in the hatch. The X6 comes with a couple of different powertrains. Like other BMW vehicles, the X6 has a long list of technological features. Prices start at over $60,000.