Replication of deduplicated vault beetwen two NAS

Hello,

I need advice. We plan to provide customer with 1 backup server where we plan to install ABR management with Storage Node. It will be:

Dell Power Edge R320
Intel Xeon E5-2420 v2 2.20GHz, 15M Cache, 7.2GT/s QPI, Turbo, 6C , 80W, Max Mem 1600MHz 1 SR
48 GB of memory RDIMM 1600 Mhz
3x 600GB SAS 6Gb/s 15rpm

We want to perform deduplication of 50 servers using this backup server and for storage we have two NAS (we plan tu perform full and differentiall backups):
2 x QNAP TS-EC1279U-RP, 16GB RAM ECC

We also want to perfrom once in month backup for 100 workstations withoput using deduplication. I need advice ho to set replication of managed deduplicated vault from one NAS to second NAS. I have 2 ideas:

1 - by creating deduplicated vault on second nas and using replication function. I have plan to have only one storage node in this configuration. How such replication (deduplicated vault to deduplicated vault) works?

2 - by using incremental replication mechanism on QNAP. I'm not sure if in this case I must consider stopping ASN service to perform replication. Is this possible to use this mechanism?