I hope to soon start commuting to work via Bicycle and I have my choices for a bike narrowed down to the following two:

Trek 7.3 FX - http://www.trekbikes.com/us/en/bikes/2008/road/fx/73fx/

Specialized Sirrus - http://www.specialized.com/bc/SBCBkModel.jsp?spid=32215

I've tested a lot of bikes and these have come up as my favorite, but I cannot really tell the difference between these. Price points are roughly the same so I'm looking for any other factors to make a decision. I'm a newbie to "serious" bike riding so I'm looking for advice from anyone with a little experience.

Thanks In Advance!