CSAB Supernumerary is different from Josaa Supernumerary.. Josaa Supernumerary is for females. CSAB Supernumerary is for admission to supernumerary seats in NIT Calicut, NIT Durgapur, and SVNIT Surat for candidates belonging to Union Territories of Andaman & Nicobar, Lakshadweep, Daman & Diu, and Dadra & Nagar Haveli.