My understanding of Argo CD is limited so forgive me but I believe Koreo is a bit more similar to Argo Workflows. Where the scripts and logic is baked into the Argo Workflow image, in Koreo it leverages other K8s controllers to do the heavy lifting of interacting with the APIs. If I understand Argo CD correctly, it is an implementation of Argo Workflows. In this way, you are able to build your own CI/CD workflow via Koreo if you so wanted.