ok, so I know how 13254654 people have asked on here about the difference in a cai and a pop charger. and it seem likes everybody responds with "i have a cai and i love it" or "my pop charger is amazing". I would actually like to see a comparison of the two. i have seen a few comparisons of the two, but nothing to influence or sway me towards one or the other. I think im looking more for sound than i am for hp. and im not sure about this but it seems to me that the pop charger with the z tube is more of a deep roar and the cai is more of whistle. that may not be true though. so i would really appreciate someone who knows alot about both of these to answer in a way to persuade me one way or the other. Thanks

o and by the way its a 04 auto sedan.. if that even matters