JWA boxy Oxford white - 484928 vs 488520

I’m based in Canada and on the website there’s two versions of the JWA boxy Oxford in white offered. Does anyone know what the difference between the two is as the description page and everything is exactly the same except for the product number. The two are listed as separate products on the website too. One is listed as a series of 4 colours, and the other listed as 2 colours.