Branding helps to retain customer loyalty, which is arguably a third way of differentiating products and services, on top of Porter's two.

ECONOMIST: Idea

Branding is one way of differentiating products and services.

ECONOMIST: Idea

Only a few companies are differentiating their products and innovating products with diversity in mind.

ENGADGET: Provoke's 2012 concepts head to New York, Nokia hopes nobody notices

With this focus, the company paid less attention to differentiating their own brand television products.

FORBES: Whither Japan Stocks: Where Sharp Went Wrong

Differentiating between healthy dairy-based or juice products and unhealthy ones, from the position of a regulator, is difficult.

FORBES: Bloomberg Big-Soda Ban: A Nuanced Plan That's Healthy For NYC