[raesene6]

I've not look too much at Mesos and DC/OS, so could be wrong, but my understanding is that where Openshift is focused on managing containerized workloads using Kubernetes and Docker or CRI-O , Mesos and DC/OS are more widely focused on managing a variety of workloads which could include containers but also VMs etc.

For me, the benefit of Openshift over vanilla Kubernetes is the additional management tooling and the strong default settings for production use.

Openshift has a lot of focus on things like manageability and security which make it well suited to production workloads in enterprises and anecodotally it seems to be taking off quite well in enterprise customers.