Cary is basically a (very nice) yuppy suburb of Raleigh. They call it the "Containment Area for Relocated Yankees". Its an area with expensive developments that people who relocated from high COL areas paid too much to live in.
I don't think it is comparable with an actual "city", unless you just call it part of "greater Raliegh".
>> CARY="Containment Area for Relocated Yankees" <<
LOL!