Hi Buddy,

I'll give a comparison of JEE 2020 and 2019 Paper. For JEE 2020 January 9 paper the difficulty level was moderate and Physics was the most difficult subject. Mathematics & Chemistry were moderate in difficulty level. In Chemistry, questions were asked from Markovnikov reaction, Anti-Markovnikov reaction, Ideal gas equations, Thermal Expansion, etc. In Physics, questions were asked from Wheatstone bridge and resistance. Questions in Mathematics had more weightage from Trigonometry, Algebra and Continuity & differentiability were dominant. Most of the students said that the exam had equal weightage of questions from Class 11th and 12th syllabus while some said that more questions were asked from class 11th syllabus.

(Source Careers360)

https://engineering.careers360.com/articles/jee-main-paper-1-analysis-2020-january-9

For JEE 2019 :

The overall paper was quite similar to the 2018 paper. It was moderately on the easier side. Those students who have prepared thoroughly should not have any problem solving this paper. Also the weightage of marks across all the topics was distributed well and was as per the syllabus defined. No special focus on any topic was observed in any of the subject.

Physics was the toughest one of all. It had a good mix of conceptual and calculative questions. Though it was not very lengthy from calculation point of view but it required a deeper understanding of most of the concepts. Questions from 12th standard were more than that of 11th standard. There were 17 questions asked from 12th standard and 13 from 11th standard. As per the past trends, this year again Chemistry was the easiest one though it was a bit lengthy. 14 questions were asked from 12th std and 16 from 11 std. Except 3-4 questions, most of the questions were either easy or moderate.

(Source: JEE Main analysis by Plancess )

https://engineering.careers360.com/articles/jee-main-analysis-cutoff-plancess

I hope you can understand the level of these two papers by this info. The difficulty of a particular paper depends on the student and sometimes even luck. These are average opinion.

All JEE Papers are cool actually, Maybe toughest paper for me will end up easiest for you.

Thank You!