caad10 alu vs. specialized tarmac comp carbon

alp aslan
alp aslan Posts: 12
edited March 2011 in Road buying advice
Hi, I'm undecided caad10-4 rival ( 1700 usd ) and specialized tarmac comp 105 ( 2000 usd )
but I am asking about frames , in your opinion caad10 alu or specialized tarmac comp.
thanks, Alp