Verdict

For a NAS or any RAID array, the WD60EFPX is the clear pick - it's a CMR drive, while the DT02ABA600 uses SMR recording, which is not recommended for RAID. Only consider the DT02ABA600 for single-drive or archival use.

DT02ABA600 WD60EFPX
Capacity 6 TB 6 TB
Recording tech SMR CMR
RAID / NAS safe No Yes
Class Desktop NAS
Spindle speed 5400 RPM 5400 RPM
Cache 128 MB 256 MB
Noise (idle) - 24 dB
Fill Air Air
Interface SATA SATA
Failure rate (AFR) - -
Price / TB - $42.42

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.