The Giant has an adjustable stem, allowing your to adjust the height of the handlebars relative to the saddle and thus adjust your final riding angle. This is ghey and not "real road bike".
I have to agree, the Trek is better all around. Especially for a new roadie, Trek service is awesome. You can email them a question about your bike and get an answer back in an hour or two. And the answer is in English. Awesome.