Same 64mb cache. Same 7200 rpms. Same sata 6gb per second. Not much really.
I personally prefer WD, because I've seen a lot of Seagates go bad. That could just be my personal experience though.
I personally agree.. I couldn't really find anything different, however WD disks are known as the most reliable. I asked this question in order to find out if it is worth saving about £15 by going for Toshiba 2T disk and rather investing those £15 to SSD which I was planning to add later on. I don't think Toshiba disks are any worser than WD however the only interesting thing is that WD is more popular and therefore people think it is also more reliable.