NEET PG is an entrance examination for admission to postgraduate medical courses such as MD, MS, and PG Diploma programs. It is taken by candidates after completing their MBBS degree. NEET SS (Super Specialty) is a separate entrance examination conducted for admission to super-specialty medical courses such as DM (Doctorate of Medicine) and MCh (Master of Chirurgiae). Candidates can appear for NEET SS only after completing a postgraduate degree like MD or MS in the relevant discipline.