I think it will also depend on what size tires you are going to put on if the wheels will fit.
The lugs (14mm x 1.5) and bolt patern (5 X 120) are the same on both cars.
The ATS-V wheel offset - front 28, rear 48.
THE CTS-V offset is different for sedan and coupe.
You may want to contact tire and wheel dealers for more fitting info.