Orbea gives a lot more customizing ability than Trek. You've gone though the Made To Order on orbea-usa.com? You can pick from several frame colors, Shimano or Campy drivetrains, multiple wheels, bars, stems, saddles, compact or standard crankset. With Trek, you get only Shimano and Bontrager components. But I guess that factor doesn't matter if one is a lot more comfortable for you.
Like others have said, you shouldn't limit yourself to those two brands. Go test ride different brands and models, even if you have to drive over an hour to bike shops in other cities. I ordered my blue Opal with Chorus from a place that's over an hour away from me.