The AA is better if you are going to try to make your gun quieter.... the Tear drop does a pretty good job too on most guns... If you are considering a tear drop I think it would be better to go with the progressive because there is no major differnce between the barrels except the price...
im my perspective, the teardrop is much better. First of all, i like the way it looks second of all, it is cheaper, and does a better job on my gun then the AA (which is a spyder imagine). i would stick to the teardrop
What you can see is what you can shoot.