like everyone says, overall, meaning CAI
on gt and gts, AEM
gives more hp. i think you want more hp, more speed, more power. unfortunately ur not gonna get that, meaning ur not gonna feel a difference. the only way ur gonna get some power off ur auto is by Turbo if thats wut you seeking for(power). you should make ur car a showcar, best way to go for an auto gts, and maybe a Turbo later on.
to answer ur questions, basically AEM
is better overall powerband. thinkin about getting headers? thatll give you a better gain and all added together(i/e/h) will give you a good hp combo.