I have switched back and forth over the years, I used to swear by seagate, then I had a couple drives that sounded like a drawer full of marbles, they ran fine, just noisy which annoyed the hell out of me using them in my pc. So I switched to WD and used those for a few years, then had a couple of falure's years back with the blue 20GB drives, just one after the other so I switched back to seagate. Then decided to go with a pair of WD blacks a few years ago, I don't think either of those made it over a year before they were both paperweights.
I don't know, it all seems to be a crap shoot with WD's for me, I have had much better luck with seagate's over the years too.