See, in JEE, you have 90 Questions to solve in 180 minutes but in BITSAT you have to solve 150 Questions (12 Bonus Questions) in 180 minutes.
So it is quiet obvious that level of Questions in BITSAT is very easy as compared to that of JEE.
Also, the questions are mainly constrained to NCERT Books only.
So I request you to study hard for it and do Attempt mock exams for sure before you go for final exam.
It helps you a lot to Excel the exams.
I hope this helps you.
The level of bitsat paper is comparable to that of jee main. But you have to solve it at faster rate than jee main. It is better to go through the analysis of paper and practise more so that you can score well.
Go through the link provided.
All the best!