As far as I know it's the same. To my knowledge, here is how the major mills' light weight tartans compare:

Lochcarron: Revier 10 oz
Strathmore: T7 11 oz
Dalgleish: K7 12 oz
House of Edgar: Never worked with their light weight, so can't say.

Subtle differences, but very important. The difference especially between Lochcarron's light weight and Dalgleish's is amazing.

The cloth in question in this thread, however, is the Cian tartan, which is available in their W60, 13 oz cloth, which is comparable in my experience to the medium weight cloth from other major mills.

BTW -- I just got a new kilt in Dalgleish's 12 oz, will be posting pics in another thread soon.