White + Warren is a New York label dating to the late 1990s, built on cashmere knitwear and best known for its travel wrap. Jenni Kayne is a Los Angeles label from the early 2000s whose California-casual knitwear centres on the cocoon cardigan. Both make the same kind of garment: relaxed cashmere layers meant for everyday wear rather than occasion dressing.
Secondhand listings rarely state gauge, ply or fibre grade, and neither brand name guarantees a figure. Judge the piece itself instead: its weight for the size, how dense the knit looks held up to light, and whether the cuffs and hem spring back after a gentle stretch. Those say more about how a used sweater will wear than the tag at the neck.
Relaxed, open cashmere knits from either house tend to pill where they rub, at the underarms, cuffs and the front of the body, and to lose shape at the hem when stored on a hanger. Check those spots in the listing photos, and ask the seller for close-ups if they're missing. Light pilling is a few minutes with a cashmere comb; a stretched, flared hem will not come back.
White + Warren is stocked widely in department stores and marked down there regularly, so buyers have seen it at sale prices and resale tends to follow that lower anchor. Jenni Kayne sells mainly through its own stores and site, with fewer visible markdowns and a customer base loyal to the house look, so its used pieces, the cocoon cardigan especially, tend to hold closer to retail. The gap reflects distribution and brand following more than any measurable difference in the knit, which is why a well-kept White + Warren piece is often the better buy for the money.
