They are not the same, but both are good companies overall.
Seagate's warranty process is pretty painless.
Ether the WDs with 320GB platters or the Seagates with 250GB platters are good choices.
...rightful liberty is unobstructed action according to our will within limits drawn around us by the equal rights of others. I do not add 'within the limits of the law,' because law is often but the tyrant's will, and always so when it violates the right of an individual. -- Thomas Jefferson