Better quality of coil wire , more precisely wound coils which would give better channel separation , better generator assembly , different body material , cantilever, more advanced stylus profile and so on ... In audio paying 10x more doesn't often mean you would get 10x better product , sometimes you pay premium for comfort of owning certain brand productsWhat makes a £1500 cart cost 10 more than a £150 one? In terms of manufacturing process? Most expensive cart I've bought was an AT one around £400, I was a bit drowsy due to hayfever, and broke it within a few days, now reluctant to pay more than £200! The Nag carts from Japan used to be good value, but prices seem to be almost on par with Europe now.