CAAD 10 5 (with 105) is a phenomenal bike. Any local crit or road race you go to, you will see a good number of these in the peleton...not so much with the Allez. Even if you are not racing, and i'am not trying to base all decisions according to what "pros" ride, but the stiffness in the BB30 bottom bracket and bull carbon tapered steerer on the CAAD10 makes its handling and acceleration hard to match...
Also, the CAAD10 FRAME is something that will stick with you and always hold value if you decide to upgrade components at a later date.