swing.
personally, i prefer to use second method.
i think it gives me more balance during the swing.
here is the easy drill that will let you find your balance.
when setting up to hit a driver, some teachers might tell you to put more weight on your back foot at address.
some teachers prefer to put 60% of the weight on the back foot at address.
by putting more weight on your back foot, your spines will tilt away from the target a bit more than normal allowing you to hit the ball from inside the target line.
this will help you cure your outside-in swing path.
so you might want to experiment with it.
but in general, 