As an added bonus you'll get better penetration from the carbons. Generally they are smaller in diameter than aluminums causing less drag and they don't flex nearly as much as aluminums on impact with the target(need to see slow mo film on this one). Since the carbons don't flex as much they maintain more of the arrows energy directly behind the broadhead and the arrow doesn't rub the sides of the wound channel as it passes into the animal.
Best penetrating arrows I ever shot were the old "skinny" beamans, harder than heck to get a helical flecth on and a bear to tune but lord did they bury!!