Verdict

For a NAS cache or any write-heavy pool, the MTFDDAK1T9TGA is the safer pick - the CT1000P3PSSD8 uses QLC NAND, which wears out faster and slows down badly under sustained writes. Only consider the CT1000P3PSSD8 for light, read-mostly storage.

CT1000P3PSSD8 MTFDDAK1T9TGA
Capacity 1 TB 1.92 TB
Form factor M.2 2.5
Interface NVMe SATA
NAND type QLC TLC
Endurance (TBW) 220 TB 5,256 TB
DWPD - 1.5
DRAM cache No Yes
Power-loss protection No Yes
Sustained write - 540 MB/s
Price / TB $103.56 $1,468.43

Highlighted cells mark the stronger spec for a NAS build. Failure rates from Backblaze Drive Stats where available; $/TB uses the cheapest live price where available.