The 1A has marginally superior maneuverability than the 1D and 1C, and is also slightly faster, at all altitudes. That said the difference is VERY slim, and you'll probably only ever notice it in a direct head-to-head match-up between Hogs. MAYBE.
Keep in mind that the 1A does carry a larger fuel load with its two wing tanks so will be a bit heavier at a given fuel load % than the 1D, which can affect perceptions of her maneuverability. As Arlo said: Burn the left wing down first. For long flights and climbs to altitude, or if I want a lot of loiter time, I usually roll at 100% fuel, burn the left and right tanks to 25%/50%, respectively, (alternate: Left to 50, Right to 75, Left to 25, etc) then switch to main, using my wing tanks as reserve. For shorter-ranged sorties I take 75%, empty the left wing and take the right to about 25%. The key is if you have fuel in the wings, keep the right wing about 25% or so higher than the left. This helps balance the plane against the engine torque.