[Ozarkryder]

At the risk of raising the ire of Stallion owners, (no ire raising intended, I would love to have a Stallion in the garage) The Wing is first and foremost a motorcycle. It just has an extra wheel in the back. The Stallion is more of a car with a wheel missing in the front. Car engine, steering wheel, foot throttle, etc.
As tmigala explained in his most excellent post, they are very different animals. On the wing you are a triker and a motorcyclist, and on the Stallion, as on a VW based trike, you are a triker, period. The VW trikes are accepted into the motorcycle world, I think because you sit on it, not in it. At the rallies I have attended where there has been a Stallion the jury is still out on if it is a motorcycle or not, state laws in your area notwithstanding. To me, it's a trike and it's cool.