Verdict

For a NAS cache or any write-heavy pool, the MTFDDAK1T9TGA is the safer pick - the MZ-77Q1T0 uses QLC NAND, which wears out faster and slows down badly under sustained writes. Only consider the MZ-77Q1T0 for light, read-mostly storage.

MTFDDAK1T9TGA MZ-77Q1T0
Capacity 1.92 TB 1 TB
Form factor 2.5 2.5
Interface SATA SATA
NAND type TLC QLC
Endurance (TBW) 5,256 TB 360 TB
DWPD 1.5 -
DRAM cache Yes Yes
Power-loss protection Yes No
Sustained write 540 MB/s 80 MB/s
Price / TB $1,468.43 $253.99

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.