See now come in sizing issues. I ride a 56 usually, if I had a c10 I could use a lay back post and. 100/110mm stem and a few spacers, or a 58 with an inline post, 100mm stem and a slammed stem...something tells me the 56 with spacers would be more comfortable.
I'm sure I read the caad8 and 10 rear triangle are the same.
The 10 has a lower front and nicer tapered fork.