A key supply chain difference between Gateway and Apple is that:

The correct answer underscores the distinct approach Apple has taken with its retail strategy. Apple has emphasized a direct-to-consumer model through its own branded stores. This commitment allowed Apple to maintain tight control over its brand experience, customer service, and product presentation. By carrying products in their stores, Apple created an immersive environment that enhances customer engagement and enables consumers to directly interact with their products.

In contrast, other companies, like Gateway, did not focus on owning a retail space to the same extent. This difference signifies a strategic choice in how each company views its relationship with customers and the role of physical retail in the sales process. Apple's retail stores are not just sales points; they serve as marketing tools, creating a unique consumer experience that differentiates it from competitors.

Overall, this choice highlights the significance of retail strategy in supply chain management and how it relates to brand positioning and customer engagement.