For the sake of SEO
Only have one of the same product within the store (And write content around it, Meta tags descriptions ect) This would make the store look more natural to Google. Basically add products like a CMS. Then add the product datafeeds into hidden category and then make comparison sets for the main product.
Also notification would be good as well, so that a 301 can be put in place if all comparison sets from the products no longer exsist. Its no good ranking for products then losing that position if you cant 301.