Several unrelated events this week got me thinking about Apple and Amazon and their different approaches to an age-old business strategy—vertical integration, which brings different stages of production and distribution of products under the control of one company. It’s worth considering whether those differences could create different antitrust risks for the companies in the coming years.

Both Apple and Amazon are among the most vertically integrated in the tech industry, handling the design of everything from hardware to software to services to retail distribution of their finished products. The similarities in their approaches to vertical integration mostly end there, though.