Flux v2 is a tool for converging the actual state (Kubernetes clusters) into the desired state defined in Git. It is a GitOps-based deployment mechanism often used in continuous delivery (CD) processes.
Argo Rollouts provides advanced deployment capabilities. It supports blue-green and canary strategies. It integrates with Ingress controllers and service meshes. Argo Rollouts can query metrics from various providers and make decisions whether to roll forward or to roll back based on the results.