Lauren Ralph Lauren sits below Polo Ralph Lauren at retail and is built to move through department stores, which means it spends a large share of its life on promotion. Polo is the core line and holds full price for longer.
The practical consequence is that the two lines never really meet at retail, so a shopper comparing them is comparing a promotional price against a full one. Secondhand, that gap narrows sharply, which is where the confusion starts.
Ralph Lauren Corporation does not own its factories. Both lines are made by contract manufacturers, and country of origin varies by garment and season rather than by line.
Italian and American production at Ralph Lauren is concentrated in the upper labels, principally Purple Label and RRL, not in mainline Polo. Treating a Polo tag as a signal of European manufacture is a common and expensive mistake.
The material gap is the real one. Lauren pieces typically lean on blends and lighter constructions that hold a price point, while Polo more often uses single-fibre wool, cashmere and heavier cottons.
That is a tendency, not a rule, and it does not settle any individual garment. The composition label does, and it costs nothing to read.
Lauren Ralph Lauren reaches buyers through department stores and outlets, usually against a seasonal discount calendar. Polo is carried in its own stores, in department store concessions and on the main site, with fewer markdown events.
This matters for resale supply. A line that sells in volume at a discount produces far more secondhand stock, and volume pushes resale prices down independently of how the garment is made.
Both lines arrive on the resale market carrying the same script logo, and a lot of listings do not distinguish between them at all. Sellers who paid outlet prices and sellers who paid full price often ask for something in the middle.
The check is short. Read the composition label rather than the brand label, note the country tag, and price the garment as the fabric it is rather than the name on it.