Both drive rock! I will say that. They really dont fail unless in a massive writing enviroment like a pc, but there are some issues.
1) Maxtors get loud and hot.
Ill try to take some pictures, but I have a spot on the HDD tray of my xbox where the bottom of a 80gig maxtor has left a tatto of its self. Drive works fine, I just fliped it over and up a fan on it.
2) WD have some issues with storage.
The company I work for actually has a policy in the IT dept that we will not buy Western Digital Hard drives. Now this decesion dosent come from a looney like Howard Hughes, but actually from a quild of other companies in the same fieild after parts have failed.
I will say though. What we do to thoese drives is horrid. On a given day, id say around 30gig is created and moved.
So really, just make sure you read up on the specif model you want. Currently I have a surplus of Maxtor 80gig 6Y080P0 and 6Y080L0 drives that I have been tossing into boxes right and left. A little loud, but cheap and exfective.