a lot of info online is long-gone but managed to find some from SS13:
100% lamb leather detail, 60% cotton 40% nylon body, lining 100% rayon. retail almost $3k.
63% cotton 37% polyurethane body, lining 100% rayon. retail 1800 GBP.
70% cotton 30% nylon body, lining 100% rayon. retail about $1.8k.
&& anecdotally i remember c4est mentioning offhand that the rug jacket (when he saw it at Barney's) was somewhere between $2-3k?
i'm only taking a guess at any quality changes but it doesn't make much sense to me why a label would cut their prices in half while maintaining similar overall quality.