[SOLVED] Whats the difference between Hitachi Hua722020Ala330 and Hua723020ala641 ?

[s1rreal]

For my gaming PC I bought a
Hitachi Ultrastar 2TB hdd Hua723020Ala641 3.5 7200Rpm Sata(6.0Gb/S)
but what came is a
Hitachi 2TB hua722020Ala330 Sata 3.0Gb/s 72000rpm
P/N:0F10942
MLC:JPK31C
FW:31C
it also says JAN-2011 near the top barcode.
Did I just get scammed ?
If there isn't much difference between them, can i keep the hdd and use it in my pc ?

 

[rgd1101]

https://documents.westerndigital.co...r-sata-series/data-sheet-ultrastar-7k3000.pdf

https://documents.westerndigital.co...tar-7k2000-and-ultrastar-a7k2000-2tb-only.pdf

lower Typ Sustain ratio, less buffer(cache)