What is the most important difference between generic software product development and custom software development? Below is the list of correct/incorrect answers. 1. The essential difference is that in generic software product development, the specification is owned by the product developer. 2. For custom product development. the specification is owned and controlled by the customer. 3. For users of generic products. this means they have no control over the software specification so cannot control the evolution of the product. 4. For users of generic products. it May limit the .customer's flexibility to change their own business processes. 5. For users of generic products. this could have implications for the user's business processes.