Thanks for the advice guys, I did not know they have the same frames. As for warranty, that's not really a selling point for me. I expect to use my bike for a long time after the warranty expires, which is why the frame is so important to me. Everything else is easily replaceable, but replacing the frame basically means getting a new bicycle.
I have lots of good dealers in my area (I live in the Netherlands, we love our bikes), so that's not really an issue either.

I'm leaning more towards the Trek then, as it looks worse. That way, there's a slightly smaller chance of it being stolen.
Do you guys have any opinions on disc brakes vs rim brakes for durability?