Exhaust sounds True duals vs X-pipe or H-pipe.

I like the rumpity rump of the first video, first post.
I, however, will be putting a Jegs H pipe on my 74. You guys call it a crossover pipe but I've always called it a balance pipe since it's supposed to help with scavenging. The only pipes I'll have to fab is from the H to the over the axle pipes.