william, you have just touched the very sensitive spot! WoW!
What you have just posted was what always kept me on my mind.
First, your lipi zhuni's wrinkle can be as even found on Zinis, but from Tim's pot has numberous unseen wrinkle in and out. And not just wrinkle, but color(guessing it contained iron red powder), natural particle, natural gloss overall doesn't look any natural to my amateur-eyes.
And all of above pots have less wrinkle leading me to understand 'ZhaoZhuang' Zhuni or Xiao Hongni. ZhaoZhuag Zhuni and Xiao Hongni's classification also not clear. Since it's from same ore bed (Nenni), it seems more yellow (redder), more delicate (higher shrinkage) clay is called 'Zhuni'. So your above picture makes me ponder it could more 'Xiao Hongni' type. Good particle http://www.chinataodu.com/article_view.asp?id=158 tells Al=alumina content as well affects in appearing a wrinkle.
Zhuni is 'mud' so it's very delicate, small particle it doesn't have any 骨-bone so easily breaks in a kiln. So potters liked to add Hongni, Shi Huang, Duanni particle and 'Tiao Sha' to make successive rate higher. But Tiao Sha Zhuni then have big particle that is opposed to 'mud' texture of Zhuni. But once it's successed to be fired with pure Zhuni, one can earn dynamic, creamy, red texture 'zhuni' clay. More wrinkle means higher failure of firing. My acquaintance quoted 'more wrinkle is better Zhuni'. Xiao Mei Yao Zhuni has the most wrinkle (over 20% of shrinkage), but purity of clay is lesser than ZhaoZhuang Zhuni, so Xiao Mei Yao Zhuni wasn't purifed red in color. ZhaoZhuang mountain was Zhuni mine and lots of pure ore could be earned. So long-timely ZhaoZhuang Zhuni has been worshipped for the great quality as Zhuni.
I'd love this conversation, WOW