Pretty much impossible to know, since we don't know the specs on the drives inside the enclosure - what G and vibration ratings, load/unload mechanism, and whether they have any kind of auto-park sensing built in.
And generally speaking, none of that matters - mobile hard drives take a lot of abuse, and I doubt either is going to have a huge reliability advantage compared to the other. On that basis, I'd get the larger drive simply because its better value (The Seagate is USB3, but I doubt a 5400 RPM laptop drive can take advantage of USB3, so the USB2 interface on the Hitachi is fine)
__________________
-Scott
|