1. Deployment: Ossec is an open-source host-based intrusion detection system that needs to be manually installed and configured on the systems to be protected, while Sophos offers a comprehensive suite of security products that can be easily deployed through a centralized management console, making it more convenient for large-scale deployments.
2. Scalability: Ossec may require more effort to scale for large environments due to its open-source nature and manual configuration, whereas Sophos provides scalable solutions that can easily adapt to the changing needs of an organization without extensive customization.
3. Monitoring Capabilities: Ossec focuses primarily on host-based monitoring, providing detailed analysis of individual systems, while Sophos offers a broader range of monitoring capabilities, including network, cloud, and endpoint security, allowing for comprehensive threat visibility across multiple attack vectors.
4. Threat Intelligence Integration: Ossec relies on its own internal threat intelligence sources for detecting and responding to security incidents, whereas Sophos integrates external threat intelligence feeds and machine learning algorithms to enhance its threat detection capabilities and stay ahead of evolving threats.
5. User-Friendly Interface: Sophos provides a user-friendly interface with intuitive dashboards and reporting tools, making it easier for administrators to manage and monitor security events, while Ossec may have a steeper learning curve for users unfamiliar with its command-line interface.
6. Community Support: Ossec, being open-source, has a strong community of users and developers who contribute to its development and support, while Sophos offers professional support services with guaranteed service level agreements for businesses requiring dedicated assistance.

In Summary, Ossec and Sophos differ in deployment methodologies, scalability, monitoring capabilities, threat intelligence integration, user-friendly interfaces, and community support.