WDBAAZ0020HNC vs. WD2001FASS

  Hello Gang, I’m actually about to purchase a new hard drive for my 1st build.  I definitely want a 2TB WD, but confused as to any difference with these 2 models.  Can someone please help me here?  Thank u much in advance.

The  WD2001FASS has 64 of cache memory, the other one has 32, that is the only difference.