Key difference: A brand is the personality of a business or a service in the consumer’s eye. It is the perception, expectation, and experiences of the customers whereas the product is a physical or non-physical helpful thing that is sold and bought.  

The primary difference between a brand and a product is that a brand is the image of a specific company or a producer of products that are helpful to the consumers in some way. Brands have a persona and uniqueness terms of “value” that the consumers find in them. The image produced by brands is responsible for brand recall and brand recognition (See Brand Recall Vs. Brand Recognition).

The brand name, it's design and its physical appearance give it an “identity” that in combination with the quality of the product or service creates an image in the consumers that influences them to appreciate it to extent of buying the products and services again and again with loyalty. A product is the actual physical (eg. Shoes) or non-physical thing (eg. software) that people buy under the influence of the brand. The product itself cannot be called as a brand because the brand has a wider image and deeper perception that the product. The usefulness or product may not be seen in the product in isolation. For example, if someone says “Nike is the best shoe brand,” they are referring to the experience with the brand as a whole rather than just the comfort of the shoes. Consumers not only like the brand because of products. They like it because of the brand design, its appearance, social proof and way of communication.