Seagate reliablility history
I don't know what current Seagate drive reliability is but anecdotally over the past 15 years I have had some catastrophic failures from Seagate drives never WD. That being the case I will happily pay 1.5X more for a WD drive of same capacity since no warranty covers the time (and perhaps data) lost when a drive fails.
I have heard that newer WD drive also suffer from increased failure rates (especially drive electronics) so perhaps it is all just random luck.
What would get me to purchase a drive would be if it came packaged with a one click clone software package allowing me to precisely clone my existing boot drive onto the new drive. I know there are lots of clone packages out there but they all seem to have their problems. I can't be that hard to have software for one purpose only, namely to create an exact copy of the primary drive which will boot when installed into the computer. I know my IT department does it all the time.