I've seen a number of older threads discussing these different conicals, some including speculation over whether they came from the same manufacturer or not. In one thread, Stout said they were different and he thought they were lighter with thinner steel, but it was still speculation. I know a number of members have these conicals. For the record, I am referring specifically to Stout Tanks And Kettles conicals compared to homebrewhousediscount's conicals sold through ebay (http://myworld.ebay.com/homebrewhousediscount
Thanks for any advice or insights you can provide.