Trusted Advisor vs Cost Optimization Hub

AWS Trusted Advisor is focusing on multiple pillars and aligns with guidance from AWS Well-Architected Framework; it's more about architectural health and operational best practices recommendations, rather than cost alone.

Cost Optimization Hub is a new feature that provides a consolidated view of recommendations from multiple tools and sources, such as AWS Compute Optimizer, EC2 Rightsizing Recommendations, Savings Plans and Reserved Instances recommendations from the suite of AWS Cost Management & Billing tools.

When it comes to cost optimization recommendations you might find some recommendations in Trusted Advisor that might not be available in Cost Optimization Hub, and vice versa.