Just go drive one and drive the Audi. Totally different feeling to the two.
If you want to really see what the X3 can do, take delivery at the Performance Center in SC. They put you in one on the track and off-road course.
This is an amazing machine! Doesn't act like an SUV.
P.S. The female in my life loved driving the X3 in SC. Sadly, she rarely gets wheel time now.
