World Sport 1 or 2?

Hey guys, I'm getting an exhaust and heard the world sport and it sounds nice. I was wondering if the world sport 2 sounded better or had any more gains. Also, what is the gains i would see from the exhaust, i have AEM CAI as well. Thanks.....what's the going price for the complete exhaust system also, not just the muffler.

The WS1 and the WS2 sound exactly the same. One doesn't give any gains over the other either. I believe the only difference between the WS1 and the WS2 is the way they're built. Someone once told me there were build quality issues with the WS1. So i'm guessing these problems have been addressed when making the WS2.