Thanks for the reply, appreciate thisUsually they would belong to the same roll of fabric, thus there shouldn't be any variance. I think S&M stocks all their fabrics that are available through MTO. Thus, this should be a non-issue.
However, I purchased a jacket 3 seasons ago. I wanted to add the matching trousers this season and was told that they don't stock the fabric anymore and that they would need to order it from the supplier. In this case, S&M disclosed that there's a risk of a slight variance in shade.