The 15 oz Fresco is a beast! Drapes like steel. Looks very old school in a good way. It's a little coarse to the touch, but not more than the 9/10 oz stuff. I'd say it wears well in winter and is perfect for layering for those who travel a lot. I had mine done with 1/4 lining and lined sleeves. It took some breaking in and has little give, so make sure you get it properly fitted by your tailor.
The Minnis version is around 15 oz and still being offered in a few colours. Minnis used to make some for H&S at around 13 oz.