Ok guys - I need help - which is the better bike here?

One local shop has the Mamba WSD I can get for 759 and here are the specs on it:
http://www.trekbikes.com/us/en/bikes...ails/mambawsd/

or another local shop has this one which is priced at 770 - no discount on it and here are specs on it:
http://www.giant-bicycles.com/en-US/...er/7303/44143/

any opinions would be great - because I have no idea what Im looking at on components since Im still a newbie.