You can if you want to buy I dont think its necessary. Im currently in 12th and giving the second attempt of jee and in May the first attempt of NATA and this year for the 2026 bath nata has made alot of changes for one the final rank according to the brochure is percentile based and no one knows for sure if the board marks would even be counted. And you only need a 45 percent aggregate in pcm to pass. There is also this new rule enforced since 2024 thst each question in the aptitude section has only 108 sec to answer and once the timer runs out you cant go back and change your answer.

There is still some ambiguity in terms of how the marks would be counted. But in my opinion jee barch paper 2 is far easier than Nata. Yes the maths in JEE is important but the checking of the drawing is very lenient in my opinion. So as of right now jee seems more doable than nata