After Market Hoods for '98 Z28

Hey Guys. Besides the look of the hood, I'm also looking at the functionality. Is there any certain hood that provides the best performance? (i.e. Ultra Z vs. SS vs. Cowl Induction?)

this is prolly gonna start some huge romp about the air flow or pressurization and all the other physics of ram air, but i would say the ultra z if any. definitely not the cowl induction, not on a fuel injected car anyways.