Verdict

Both are comparable SSDs. The MZ7L31T9HBLT-00W07 is rated for more write endurance than the MZ-V9P1T0, so it's the longer-lasting choice for a NAS that sees steady writes; for light use either is fine and price decides.

MZ-V9P1T0 MZ7L31T9HBLT-00W07
Capacity 1 TB 1.92 TB
Form factor M.2 2.5
Interface NVMe SATA
NAND type TLC TLC
Endurance (TBW) 600 TB 3,504 TB
DWPD - 1.0
DRAM cache Yes Yes
Power-loss protection No Yes
Sustained write - -
Price / TB $204.12 $445.18

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.