I have the 2006 version. It is the comp double. I am not sure if you are looking at the 2006 or the 2007, but I decided on the comp over the sport, because the trigger mechanism on the sport was not made to where a normal person could reach under to shift the gears. I preferred the shifting style on the comp. I did not like the carbon seatpost that came with mine. I ended up getting a FSA seatpost.

I did pay more than what I would of for the sport, but I wanted something that was completely equipped (except for the seatpost) that I would not have to change out with other accessories later.

If I was going to do it all over again and I had to choose the 2007 sport or comp model, I would still go with the Comp. It is worth the extra money in my honest opinion.