I have no idea what they would look at, but if I was looking I would say the rounded one does give you and aero advantage over the front of the tank unfaired. So to have a squared off tank and then an aero shaped shield would in my mind constitute aerodynamics.
Now if the front of the tank was rounded to gain the necessary volume and the shield was in the same shape you might have a case, but probably a pretty thin one.
Nice work though and remember I won't be in impound inspecting anything, so the above holds no water,
Sum