Exactly the same antenna, just located a few feet higher improves noise and multipath. Then, just being outdoors instead of indoors also improves these. Finally, being directional adds another big improvement, but that requires a rotator, so added effort to tune every station. Or, if you only have one favorite station, then you'll be loving it, even with no rotator. Signal strength is not the major factor that affects sound quality. Multipath level and interference (from noise and other stations) are much more imperative to control.
