JEE Advanced

Hi Faraz,
JEE Main Paper 2 is conducted for admissions to B.Arch/B.Planning courses at NITs, and other Centrally Funded Technical Institutions. JEE Mains paper 2 is based on both drawing and maths skills , it has a math section (level is same as the jee mains paper 1) and a sketching and 3D interpretation section. The rank you obtain in paper 2 is independent of the paper 1 rank. The exam, like the paper 1 is conducted by CBSE and helps you secure an admission in SPAs ( School of Planning and Architecture) and the B.Arch courses in NITs. ( SPA Delhi is considered the best in the country).
NATA is a compulsory Exam conducted by the Council of Architecture and most of the institutes /colleges accept only NATA scores. NATA is a test which only tests drawing and 3D interpretation skills and even students from humanities or commerce background can answer the exam.The exam does not test mathematics or science knowledge. The exam is conducted by the Architecture's Association and it helps you secure admission recognized by them and you need to apply to different institutes independently with the NATA scores. CEPT in Ahmadabad is one of the good college which accepts NATA scores.
Hope this information helps. Please feel free to revert.
Wish you luck.