Document URL:
https://docs.openshift.com/container-platform/4.3/service_mesh/service_mesh_arch/ossm-vs-community.html
Describe the issue:
One of the examples where Service Mesh uses a different resource compared to upstream Istio is the 'ServiceMeshPolicy' resource as in
https://maistra.io/docs/examples/mesh-wide_mtls/
.

Upstream Istio documentation elaborates the use of 'MeshPolicy' resource as in
https://archive.istio.io/v1.1/docs/concepts/security/#policy-storage-scope
however, Openshift Service Mesh has replaced that resource with 'ServiceMeshResource' due to multitenancy implementation.

Refer
https://access.redhat.com/solutions/4848531
.

Suggestions for improvement:
Include the comparison information from upstream Maistra documentation as well as in
https://maistra.io/docs/comparison-with-istio/
.

From usage perspective, the official Openshift Documentation still misses out on which are the resources relevant in Service Mesh and replaces upstream Istio resources. Having this documentation will greatly help.