Before you swap the wheels, check the tyre pressures are at "comfort" psi not 40psi. The 16 inch has a larger side wall, so is slightly more forgiving on our wonderful roads. Also need to check the 16 goes over your brake calliper, in particular the front. And some might suggest to inform insurance as they'll likely consider it a modification.
Or... as the CC version has a larger sidewall, look at fitting 225/50/17 tyre which also will be slightly more forgiving