Here is an outline of a few key differentiators

Monitoring

CloudMonix provides a ton of additional insight into Azure resources, due to its capability of capturing non-numeric signals and its direct connectivity to various/most resources
CloudMonix provides comprehensive starting templates with metrics and alerts, that require no or minimal adjustments. Default monitoring setups or profiles do not exist in Azure portal

Alerts & Integrations

CloudMonix can immediately publish production alerts not only via email and SMS, but to over a dozen different popular ITSM, communication, and system management tools. Number of tools that CloudMonix connects to, far exceeds those supported by the Azure Portal
CloudMonix's alerting engine is extremely sophisticated. It is capable of evaluating complex and nuanced conditions using metrics from any monitored resources in the environment

CloudMonix is capable of executing out-of-the-box useful self-healing tasks. Self-healing instrumentation takes seconds to set up and does not require manual coding or complex Runbook scripts. This capability goes far beyond simple webhook or Runbook automation in Azure portal
CloudMonix is capable of auto-scaling a variety of resources using a wide variety of signals and rules. These capabilities far exceed Azure portal

CloudMonix allows users to scroll their dashboards back in time to get a view of their latest. This is incredibly useful for root cause analysis
CloudMonix stores monitored data for up to 1yr and is capable of generating historical reports and dashboards for that duration
CloudMonix allows users to receive scheduled daily weekly, monthly, and quarterly summary reports
CloudMonix allows MSP and CSP users to visualize all of their customers under a single view