Getting back to the original question, I would say unless someone was a seamstress and REALLY knew their fabrics, they could not tell difference between one of Rocky and Kelly's Semi-traditonal and a wool tank. Having just picked up 3 semi-traditionals and one premium yesterday and because hanging around this chick that is a very good seemstress for the last 26 years, I can tell the difference in the fabric on site. As far as otherwise? Buckles are the same, construction pretty much the same and, since my wife is a seemstress, Rocky and Kelly have taken the time to show her the differences while in the shop. That all being said, the average person can't tell the difference between a casual and a tank, in my mind. Attention to detail is a rate commodity these days. Thank God USA Kilts gets it and that's why I'm "sold" on their products (not to mention over the top customer service). Bottom line, I defy anyone but a fabric/textiles/kilt making expert to be able to tell the difference between a USAK Semi and a full wool tank.