Both VR and RPVM provide data protection and disaster-recovery capabilities. Both are software-only solutions that are embedded in the hypervisor, use vApps for control, and are managed from vCenter. Which one to use depends on the use case.
Local replication to other systems, remote replication to other VxRail clusters, or non-VxRail vSphere clusters may be configured. Remote replication may be used to provide DR to ROBO sites. Other use cases include VM migration from other vCenter environments into and between VxRail environments.
For basic replication that is fully integrated and easy to manage using VMware vCenter, VR provides these capabilities at no additional cost. If an RPO of less than five minutes, only RP4VM can provide continuous data replication with DVR-like playback. RPVM also supports more flexible deployment options including concurrent local and remote replication and multiple sites in a 2:1 or 1:2 configuration.
Regardless of the replication choice, solution sizing should include the additional storage capacity required and the overhead of replication vApps.