Not that I know of, LM. It's just that they are ... well ... from Seagate. In all probability, they are likely to be just as good as anything else. But my most recent experiences with Seagate drives in any number have been very poor. That's not very recent, and it was desktop drives, not notebook units, but they were piss-poor reliability-wise a few years back, and the bad feeling persists.
If the Samsung in my laptop karks it one day, I'll be seriously inconvenienced and put it down to sheer bad luck. But if I bought a Seagate and it karked it, then I'd be equally seriously inconvenienced, but also feel extra bad because I'd blame myself for being such a bloody fool as to buy a Seagate in the first place.
It's not exactly logial, but there you have it. These days my laptop drive is the most important drive I have (i.e., most-used, most inconvenient to replace) and I just don't feel comfortable using anything less than the most reliable brand I know of (Samsung).
Does measured desktop drive reliability actually have anything to do with the reliability of the same firm's notebook drives? Quite possibly not. But why take chances?
It comes down to a balancing thing: is 50% greater capacity worth an unknown greater risk? Right now, no. I can get by with an external 200GB USB/Firewire drive and by burning extra CDs. Sometime in the future I will really need that capacity. But, with any luck, by then Samsung will have a bigger model, so I won't have to trust Seagate after all.
Or maybe I'll take a punt on Hitachi. I'd feel pretty comfortable with a Hitachi notebook drive.