I wouldn't assume anything Heritage of Scotland (aka ScotlandShopDirect, Kiltsworld, JMKilts, etc) says is true. The reason the tartan is 'different' is quite likely that it's made in India, China, etc. and not Scotland. Most of the rubbish they sell are poor third world forgeries of authentic products. Even if you see an identical photo of a sporran or something that you've seen on another site, don't assume it's the same! View the real thing and their version side by side and you'll know at once. They're a family of Asian 'entrepreneurs' with no history in Highland Dress, employing cheap often foreign sales staff with little clue about the products, in a chain of awful tourist shops blaring out taped bagpipes on Scottish streets who fool the ignorant into buying their cheap copies. The issue was raised in the Scottish parliament last week with a probably ill-fated effort to make their imported fake 'Scottish' products illegal, as it's damaging the genuine trade so badly. Buy from them at your own risk!