1. Scalability: Laravel Vapor is a serverless platform that automatically scales based on the demands of the application, while OpenFaaS allows users to scale their functions on-demand but does not offer automatic scaling capabilities.

2. Integration with Laravel: Laravel Vapor is specifically built for Laravel applications, providing seamless integration with Laravel features, whereas OpenFaaS is a more general-purpose serverless platform that can be used with various programming languages and frameworks.

3. Maintenance: Laravel Vapor handles all the server management, maintenance, and upgrades automatically, reducing the overall workload for developers, whereas with OpenFaaS, developers are responsible for managing and maintaining the server infrastructure.

4. Deployment Process: Laravel Vapor simplifies the deployment process through a streamlined interface and a focus on Laravel-specific features, making it easier for developers to deploy and manage their applications, in contrast, OpenFaaS offers a more customizable deployment process that allows for more control over the environment.

5. Cost Structure: Laravel Vapor operates on a pay-as-you-go pricing model, where users only pay for the resources they consume, while OpenFaaS can be deployed on any infrastructure, allowing for more flexibility in terms of cost management.

6. Community Support: Laravel Vapor benefits from the Laravel community's extensive support and resources, providing users with a wealth of knowledge and tools to leverage, whereas OpenFaaS has a dedicated community but may not offer the same level of resources and support as Laravel Vapor due to its niche focus.

In Summary, Laravel Vapor offers automatic scalability, seamless integration with Laravel, simplified maintenance, deployment process, pay-as-you-go pricing, and extensive community support, while OpenFaaS provides more customization options, broader language support, and flexibility in deployment infrastructure.