From the perspective of the strength of CS program, UDel is a national research university and TCNJ is a regional liberal arts college . The scale of research done by professors and the range of undergrad courses and subfields will be greater at UDel. Also, the campus seems quite friendly. Changing majors is difficult at TCNJ. It may be easier at UDel, but you have to check. (My background : I am a university math prof in NJ and my kid is majoring in CS at NJIT .)