Verdict

These are comparable SSDs. The LNM790X004T-RNNNU is rated for the most write endurance, so it lasts longest in a NAS that sees steady writes; for light use any is fine and price decides.

LNM790X004T-RNNNU
Lexar NM790 · 4TB · Desktop
$580 ($145.00/TB)
MZ-V9S4T0BW
Samsung 990 EVO Plus · 4TB · Desktop
$579 ($144.75/TB)

Value at a glance

Price / TB
LNM790X004T-RNNNU $145.00
MZ-V9S4T0BW $144.75
Endurance (TBW)
LNM790X004T-RNNNU 3,000 TB
MZ-V9S4T0BW 2,400 TB

Price history

US · cheapest per day

LNM790X004T-RNNNU $580 MZ-V9S4T0BW $579
zoomed · drag to zoom
$598 $549 $500 Aug 21 Aug 26 Aug 31 Sep 5 Sep 10 Sep 16
LNM790X004T-RNNNU MZ-V9S4T0BW
Capacity 4 TB 4 TB
Form factor M.2 M.2
Interface NVMe NVMe
NAND type TLC TLC
Endurance (TBW) 3,000 TB 2,400 TB
DWPD - -
DRAM cache No No
Power-loss protection No No
Sustained write - -
Cost / TBW $0.193 $0.241
Price / TB $145.00 $144.75
Buy
$580
View at Amazon →
$579
View at Amazon →

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

LNM790X004T-RNNNU

No Backblaze failure data for this model.

MZ-V9S4T0BW

No Backblaze failure data for this model.