Hello aspirant,

The level of difficulty in JEE exam paper varies from one IIT to other IIT and from year to year. Yes, the question paper is set by different IITs each year but you can't assume the level of difficulty from IIT Kharagpur or any other IIT. So please, don't assume such thing rather you should go through the concepts properly and prepare and clear your doubts. See, if you don't prepare properly, whoever IIT set up the question it will always feel difficult and if you have prepared accordingly, you won't feel difficult.

Hope, this answer helped you. Good Luck!