In following a claim that VC contained the growth hormone Auxin, I found a link you may find interesting/useful.

Scroll down to HORMONAL INFLUENCES. I suspect that further study will demonstrate the superiority of VC.

Actually, I found the entire document instructive re: distinct cell types in all plant material.

BTW .. the linked article doesn't address VC .. I found that claim here:

http://www.mixph.com/2006/04/backyard-production-of-earthworms-vermiculture.html

SCROLL DOWN TO ... Advantages of Vermicomposting.

[SIGH...so much to learn, so little brain power]

Here is a link that might be useful: Natural Auxin