People like lists and reading all the options they provide. When I'm researching a product I'm going to buy, I prefer to read top 10 list type articles so I can see how the product compares to similar items. Articles that focus on a single product are harder to rank for since you will be competing with the manufacturer's page and Amazon page. And personally, those are the first places I would go to read about a product.
I suggest trying both strategies and seeing which one yields more ad clicks and product referrals.