on PCPP it looks like the same drive with different model numbers, however the more expensive is also highly rated. I was planning on buying the cheaper but with those ratings I'm now a little unsure.
Also, could you guys recommend a 2TB HDD 7200rpm?
http://pcpartpicker.com/part/seagate-internal-hard-drive-st32000641as
http://pcpartpicker.com/part/seagate-internal-hard-drive-st2000dm001
IIRC, the XT version was the 1st SATA3 2TB hard drive on the market. But with many SATA3 drives with larger storage space on today's consumer market, I don't see any reason to get the XT any longer, unless you're not fuzzy on cash. Same cache, same interface, etc; what else?
for some reason i enjoy doing this:
The max sustained data transfer rate for the ST32000641AS is 138MB/s, whereas the eqivalent spec for the ST2000DM001 is 210MB/s.
That said, the other specs for the ST2000DM001 look strange. For example, the 2TB drive is listed as having the same number of heads (6) and disks (3) as the 3TB model. Instead I would have expected that it would have 4 heads and 2 disks in order to maintain the same data density of 1GB per platter, and therefore the same transfer rate.
http://www.tomshardware.com/forum/277509-32-difference-seagate-barracuda-normal-version
he links product manuals