I'm sure Rocky will chime in here, but I'm certain that USA Kilts is an L&M retailer, so at least some of the sporrans they sell are L&M sporrans. So depending on which sporrans you are looking at, the question of comparison is a moot point.

We also sell L&M sporrans at the Scottish Tartans Museum, so I can attest to their high quality. We used to carry Nichol Brothers sporrans from Scotland before that age-old venerable company went out of business. I can honestly say that I've had fewer quality issues with the L&M brand than I did with Nichol Brothers.