Answer
Ok so basically the x3 is mini compared to the x5.
like ipod video to ipod nano.
so the x5 is bigger and more powerful, it also costs more.
it
depends on what your looking for.
if u want a entry level luxury suv this is the car for you.
however, if you are looking for a powerful pricier bmw x5 i would pick the x5.
personally for the price difference i would take the x5 because its more like a bmw and and has more luxurious features.