I've found a lot of / increasing variation amongst units of the same clothing item, here in the U.S. For jeans and casual slacks, for example, I've become accustomed to taking several units of the same measure to the dressing room and selecting those that fit best. Individual units often vary quite significantly, even when from the same stack in the same store.

I'm not much of a clothes hog nor shopper, but LL Bean has had the most regular cuts that I've found, in my quite limited experience. I used to be able to order an item and, if the same size in that item had previously fit me, count on the new item fitting. Although more recently, while using one of their stores, I found more variation in their jeans. I'm glad I didn't order my last batch by mail and have to return 1 or 2 out of 5.