Verdict

These two are closely matched CMR NAS drives of the same capacity - decide on price and warranty. Check the live $/TB above.

ST1000VN002 WD1005FBYZ
Capacity 1 TB 1 TB
Recording tech CMR CMR
RAID / NAS safe Yes Yes
Class NAS Enterprise
Spindle speed 5900 RPM 7200 RPM
Cache 64 MB 128 MB
Noise (idle) - 20 dB
Fill Air Air
Interface SATA SATA
Failure rate (AFR) - -
Price / TB $122.97 $164.69

Highlighted cells mark the stronger spec for a NAS build. Failure rates from Backblaze Drive Stats where available; $/TB shows once live prices are wired.