I've never owned a seagate that's lasted more than a year before dying or getting corrupt data due to very heavy use. I now ONLY by western digital because I've never had a single one go wrong. My vote would be to get the WD.
I'm sure many get along with Seagate okay, but they're normally only bought because they are cheaper than WD. The Western Digital Black have better performance, lower heat, lower noise - and in my case at least - last for longer.