One of the differences between a MVP and a MBI is that:

The distinction between a Minimum Viable Product (MVP) and a Minimum Business Increment (MBI) is crucial in agile practices. An MBI typically refers to a smaller, incremental feature or functionality that adds value to an existing product. It is developed to enhance or extend the capabilities of the product, often built incrementally based on user feedback and the current state of the product.

On the other hand, an MVP represents the simplest version of a product that can still deliver value to customers, allowing teams to validate an idea or concept quickly before investing more resources. It is generally independently released and is intended to gauge market response.

Choosing to emphasize that the MBI is typically built incrementally on top of an existing product captures the essence of its purpose—incremental addition of features responsive to customer needs and operational requirements, while the MVP serves to establish the viability of a product concept. This understanding helps in applying the concepts effectively within agile frameworks.