All I can say and this comes from experience, the samples of "16ozPV" that I have from various companies are nothing but crap as compared to the stuff a great many of us use from MM.
I have some 13oz from a Canadian supplier and it is fairly nice, but nothing has come close to the standards that MM has and the standards we at CCK have for farics used , my advice don't settle for substandard fabric get something that looks good and feels good. MM makes it in 11oz the Maple Leaf tartan was done in 12oz as I wanted to have a bit more weight in it.