Storage Replica (SR): Storage Replica replicates an entire source volume to a destination volume. You cannot specify a particular data set located inside a source volume when configuring a replication plan.
Hyper-V Replica (HR): Hyper-V Replica operates on the VM level.
Microsoft, S2D [SDS]/2.0, Datacenter
Remote Replication Granularity, Disaster Recovery, Data Availability