Wow. Thanks for the responses. This sure is an active forum!
I didn't expect anyone to be that geeky about the differences in the denim to experiment with them; just thought it would be cool. Obviously everyone wears their jeans differently, and even the same person wouldn't produce the same fades on different pairs of jeans.
I suppose that the 19oz denim is fairly similar to the 21oz denim then, and will produce lovely classic IH fades.
BTW, thanks Beatle for doing such a wicked job of photographing your jeans. I hope to wear mine someday as well as you are wearing yours!