Verdict

Both are comparable SSDs. The SEDC600M/1920G is rated for more write endurance than the SB-RKT4P-1TB, so it's the longer-lasting choice for a NAS that sees steady writes; for light use either is fine and price decides.

SB-RKT4P-1TB SEDC600M/1920G
Capacity 1 TB 1.92 TB
Form factor M.2 2.5
Interface NVMe SATA
NAND type TLC TLC
Endurance (TBW) 700 TB 3,504 TB
DWPD - 1.0
DRAM cache Yes Yes
Power-loss protection No Yes
Sustained write - 530 MB/s
Price / TB - $670.26

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.