Do you have direct admission to the CS major at each school?
Both do have admission-to-major requirements if you do not have direct admission, but they are not hyper-competitive like at some other schools.
http://student.engr.ucr.edu/policies/requirements/majorchange/cs.html
http://student.engr.ucr.edu/policies/requirements/majorchange/cen.html
https://www.cs.purdue.edu/undergraduate/codo.html