While I think the unbridled hyperbole on the StationX website is absurd, I will say that when it comes to Linux laptops, having all the components work correctly with Linux (and it be stable!) is probably the hard thing to make.
I don't know if these guys do that part well, but if they actually make it work flawlessly (and if their competitors don't do as well), then the cost difference might be worth it.
Frankly, I haven't found any new laptop of any OS to work great all the time. It's like we've moved back in time about 15 years. Everything sucks in some way.