I may be misunderstanding something here
Are you talking about v10 media servers that you want to backup wioth v10d, or is t just that the servers are running the v10.0 RemoteAgent?
If they are media servers, you cannot back them up from another media server.
if they are just running RemoteAgents, the RAWS needs to be the same version as the media server attaching to them, to meet Veritas/Symantec licensing criteria.
a v10d media server SHOULD be able to connect to a v10.0 RAWS, but the SCL http://seer.support.veritas.com/docs/278254.htm specifically says this is "for the purpose of rolling upgrades"