Verdict

These are closely matched SSDs of the same capacity - decide on price and warranty. Check the live $/TB above.

MZ-V9S4T0BW
Samsung 990 EVO Plus · 4TB · Desktop
No IT price yet
MZ-VAP4T0BW
Samsung 9100 PRO · 4TB · Desktop
No IT price yet

Value at a glance

Price / TB
MZ-V9S4T0BW $144.75
MZ-VAP4T0BW $280.88
Endurance (TBW)
MZ-V9S4T0BW 2,400 TB
MZ-VAP4T0BW 2,400 TB
MZ-V9S4T0BW MZ-VAP4T0BW
Capacity 4 TB 4 TB
Form factor M.2 M.2
Interface NVMe NVMe
NAND type TLC TLC
Endurance (TBW) 2,400 TB 2,400 TB
DWPD - -
DRAM cache No Yes
Power-loss protection No No
Sustained write - -
Cost / TBW $0.241 $0.468
Price / TB $144.75 $280.88
Buy No IT price yet No IT price yet

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.

MZ-V9S4T0BW

No Backblaze failure data for this model.

MZ-VAP4T0BW

No Backblaze failure data for this model.