Differences in Mills?

[Captain]

I have a question about a particular tartan. When my beautiful bride and I were married I wore piece of tartan that I then draped on her. I wasn't into kilts at the time (though I did want to be married in one, but we did fast and on a budget instead of drawn-out and overblown... no she wasn't pregnant), and didn't really think much of it until now. Now I want a kilt in the same tartan, the Cian tartan, the clan to which my family would've been associated with. I found a mill weaving the cloth in 13 oz wool and Matt Newsome will be sewing it up... but just because my wife's paranoia is wearing off on me, I ordered a swatch first... And the two fabrics don't match. I mean, it's the same pattern, even though the sett is smaller on the new fabric... but the hue is way different. Now, I think I actually like the newer one myself, but is there normally this much variance between mills?



The one on the left is the newer fabric that Strathmore Woolen Company sells and the one on the right is the sash I bought directly from the clan (via the web site)... So is this normal, or is this more a case of someone doesn't really have permission to reproduce the tartan and just kinda guessed?