The headline numbers
JEE Main 2024 saw ~14 lakh registrations. NEET UG 2024 saw ~24 lakh registrations. On raw aspirant volume, NEET is the larger funnel. But aspirant volume isn't the right measure of difficulty — the seat ratio is.
Seats vs aspirants
JEE Main → JEE Advanced → IIT funnel: ~14 lakh write JEE Main, ~2.5 lakh qualify for JEE Advanced, ~17,000 IIT seats. So an IIT seat is ~1 in 80 of all JEE Main aspirants. State engineering colleges via JoSAA / state CETs absorb many more, making "any engineering UG" much easier (~80% of serious aspirants land somewhere).
NEET UG → MBBS funnel: ~24 lakh write NEET, ~12 lakh "qualify" (have a non-zero score), but only ~1.1 lakh MBBS seats (govt + private + deemed combined). That's ~1 in 22 for an MBBS seat — meaningfully higher base rate than the IIT bar but brutal at the top because govt MBBS is ~57,000 seats. State quota dynamics compress this further by state.
The compression problem
JEE marks are spread across a wide score band — a 90th-percentile JEE Main score opens hundreds of NIT/IIIT/state options. NEET marks compress tightly at the top: ~720 max, and the top 10,000 ranks are clustered within a 50-mark range. One careless mistake costs 30-40 ranks at the top, which can be the difference between AIIMS Delhi and a state college.
What this means for prep
For JEE, optimise for top accuracy + speed across PCM. For NEET, optimise for zero-mistake recall — the top is so compressed that completeness beats depth. Both demand 2+ years of consistent prep; neither rewards last-3-month sprints the way some coaching marketing claims.
Choosing between them (or both)
PCMB students often write both. The opportunity cost is your time. If your strengths are problem-solving over recall, lean JEE. If you're a strong recaller with good biology aptitude, NEET's compressed top is more attainable than the IIT-top funnel for similar effort.
Honest takeaway
"NEET is harder" or "JEE is harder" are tribe statements, not insights. The two exams test different cognitive profiles, have different seat ratios, and reward different prep strategies. Pick based on the cognitive profile you actually have, not the one your community celebrates.