It's the weathered that you have. The Ancient is still very green, as is the muted. Although, the MacKenzie weathered you have from SWK is still quite different than the Weathered MacKenzie I have from Lochcarron. Mine seems more muted in colour, but I suspect it is the type of fabric and difference in mills.

As for the clan MacKenzie site, they don't even list the Weathered tartan on there. The Brown muted is a different hue altogether from the weathered, and the only one with weathered in the title is the Mackenzie Muted Green.

One of the nicest MacKenzie tartans I have ever seen was at Rob MacDonald of www.westcoastkilts.com house. He has the Seaforth tartan worn by his grandfather in the great war. The tartan is very faded and very worn, but the colours are very vibrant and look incredible.

The best bet it to go to a site like Kiltstore.net and see the variations they offer from the different mills.
http://kiltstore.net/sr_swhdr_eighty...on_id=4rcEgjSt and more specifically http://kiltstore.net/sr_swhdr_eighty...Kenzie:stage=2