When you say *better*, you might mean is there anything I need to know about Seagate vs Hitachi drives. You might have experience with either or neither but both manufacturers have a very good name so you have narrowed your choice very well. AFAIK, as fryke mentions, there are 'monday-models' regardless of vendor but the odds decrease when dealing with reputable's like Seagate/Samsung/Hitachi. This is my opinion and not based on any fact I know of.
I use Seagate and can't say I've ever experienced any issues with my drives but have recently read that Hitachi drives *may* be quieter and cooler than Seagate.
You could do some further research on those factors if you like or take the plunge on your gut feeling based on your choice of two top level brand names.