Comparing JEE and NEET is tough because they are two very distinct exams.

NEET is the doorway to medical schools for MBBS, BDS, ayush courses, and veterinary i.e. BVSc. Jee main is the doorway to engineering institutions such as NITs, IIITs, and CFTIs, whereas NEET is the doorway to medical institutions for MBBS, BDS, ayush courses, and veterinary i.e. BVSc. Questions from physics, chemistry, and math are asked in the jee main exam, whereas questions from physics, chemistry, and biology are asked in the NEET exam.

Hi

JEE  and NEET are two completely different examinations, so comparing them is quite difficult.

Jee main is gateway to engineering colleges including NITs, IIITs, CFTIs while NEET is the gateway to medical colleges for MBBS, BDS, ayush courses and veterinary i.e BVSc . In jee main, questions are asked from physics, chemistry and maths while in NEET questions are asked from physics, chemistry and Biology.

But yes,

As far as difficulty level of the question is concerned JEE MAIN is TOUGHER than neet.

This is because,

In jee main both breadth and depth of questions is covered, I mean you will see variety of questions and many tricky ones are asked as well , but in neet only breadth or variety of questions are there but these are generally formula based, question of very high difficulty level is not asked and overall paper in general remains easy to moderate.

In terms of competition,

neet is tougher because, number of seats in government medical colleges is handful when considered to Engineering colleges. And when someone doesn't get a seat in a govt medical college then generally he has no other options as fee of private medical colleges is insanely high and it can be up to around 1 crore unlike engineering where even if you don't perform very well, you still have choice of decent private colleges at affordable fee.

Coming to JEE advanced, it is conducted by IITs.

JEE advanced is the toughest when it comes to level of difficulty.

This is because,

In JEE advanced questions single concept questions are rarely asked ,questions are a mix of two or more concepts which makes them very tricky and to solve them you need to have deep understanding of the concepts. Also in JEE advanced you have MCQs having more than one correct options and its paper pattern keeps changing a bit every year which makes it challenging

So, in Short, in terms of level of difficulty:-

JEE ADVANCED > JEE MAIN > NEET

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