360 header gains?

There was an Engine Masters episode that Dyno runs of crush vs mandrel was no diff.
In your power level on street car good flowing cast manifolds are fine.
What Pypes says of their test show that the X Pipes give more Lower End Torque and H gives more Top.
But am betting that in street level HP and TQ apps does not matter.
I think the main thing is the X will change the sound and have diff sound than the H.
Some guys dislike (hate) the X Sound over the Sound of H pipe.
I grabbed the X as the H was out of stock. As things would have it I still never put the new stuff in use.