Yes. Snapshots are quick, can be scheduled and are very flexible. They have versioning capability and scheduling capability. As I understand it (someone correct me if I am wrong) but a snapshot is a bit level “picture” of your volume at a given point in time. You can recover the entire volume from a snapshot. Snapshot replica is the process of storing your snapshots on a remote (Vault) NAS.
The only caveat: Both NAS must be running the same OS (ie: QTS on both or Hero on both) and you need to have the same or larger drive space available on the second NAS. Even though snapshots are very efficient when it comes to space, if your first NAS goes hard down, you could recover the entire set of volumes on the second NAS. That’s why you have to have similar storage spaces.