1. Configuration and Management: Azure Monitor is a cloud monitoring service provided by Microsoft Azure that allows users to collect, analyze, and act on telemetry from applications and resources in Azure. It offers centralized configuration and management for monitoring various Azure resources. On the other hand, NGINX Amplify is a monitoring and management platform specifically designed for NGINX web servers. It provides real-time analytics, detailed metrics, and customizable dashboards for NGINX web server instances.

2. Supported Platforms: Azure Monitor is tailored for Azure services and resources, making it a comprehensive monitoring solution for Azure-based applications and infrastructure. It supports monitoring and integration with a wide range of Azure resources including virtual machines, containers, storage accounts, and more. In contrast, NGINX Amplify is focused on monitoring NGINX web servers regardless of the underlying infrastructure. It supports NGINX running on any platform, whether it's on-premises, in the cloud, or in a containerized environment.

3. Metrics and Insights: Azure Monitor provides a wide range of pre-built metrics, logs, and insights specific to Azure services and resources. It offers rich monitoring capabilities for applications and infrastructure deployed in Azure, allowing users to gain deep insights into their Azure-based workloads. NGINX Amplify, on the other hand, focuses on providing detailed metrics and analytics specifically for NGINX web servers. It offers real-time monitoring and visualization of NGINX-specific metrics such as requests per second, response time, error rate, etc.

4. Alerting and Notifications: Azure Monitor offers comprehensive alerting capabilities, allowing users to set up alerts based on predefined conditions or custom queries on metrics and logs. It supports various notification channels such as email, SMS, webhook, and integration with incident management systems. NGINX Amplify also provides alerting functionality, allowing users to configure alerts based on specific NGINX metrics or events. It supports notifications through email or integration with third-party services like PagerDuty.

5. Third-Party Integration: Azure Monitor offers seamless integration with other Azure services and tools, allowing users to leverage the full power of the Azure ecosystem for monitoring and managing their applications and infrastructure. It supports integration with Azure Log Analytics, Azure Automation, Azure Functions, and more. NGINX Amplify also provides integration with popular DevOps and monitoring tools such as Splunk, Datadog, Elasticsearch, etc., allowing users to integrate NGINX monitoring with their existing toolchain.

6. Scalability and Performance: Azure Monitor is built on top of the scalable and highly available Azure infrastructure, ensuring high performance and scalability for monitoring workloads at any scale. It leverages Azure's global presence and supports data ingestion from multiple Azure regions. NGINX Amplify is designed to handle high traffic loads generated by NGINX web servers, providing real-time monitoring and analytics without impacting the performance of the NGINX servers themselves.

In Summary, Azure Monitor is a comprehensive cloud monitoring service for Azure-based applications and infrastructure, offering centralized management, deep insights, extensive integrations, and scalability within the Azure ecosystem, while NGINX Amplify focuses on monitoring NGINX web servers, providing real-time analytics, customizable dashboards, and integration with popular DevOps tools.