Verdict

For a NAS or any RAID array, the WD20EFPX is the clear pick - it's a CMR drive, while the CT2000P3PSSD8 uses recording, which is not recommended for RAID. Only consider the CT2000P3PSSD8 for single-drive or archival use.

CT2000P3PSSD8 WD20EFPX
Capacity 2 TB 2 TB
Recording tech CMR
RAID / NAS safe No Yes
Class Desktop NAS
Spindle speed - 5400 RPM
Cache - 128 MB
Noise (idle) - 24 dB
Fill - Air
Interface NVMe SATA
Failure rate (AFR) - -
Price / TB $162.00 $84.35

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.