If you're replicating using RP then you should be using the RecoverPoint SRA.  The Unity SRA is for native Unity replication.
Hi Team,  Can you please advise which storage array adopter we will use for vmware site recovery manager? We are using below components.  EMC Unity 300 vRPA Classic 5.1 VMware 6.5 VMware SRM 6.5.1   EMC RecoverPoint SRA EMC Unity Block SRA   Regards, MAwais
EMC Unity or EMC RPA SRA