No, as per the students who have attempted both the exams, Jee is tougher than BITSAT as BITSAT is based on overall knowledge of a student apart from only PCM. It tests your command on English language along with your logical application skills. It offers low complexity in PCM section with more number of questions, you only require basic knowledge in PCM. Apart from PCM, you must be thorough with the English language with good vocabulary, grammar and comprehensive ability whereas JEE Main is solely based on PCM and contains less number of questions so it is obvious that each question will now require more analysis. JEE Main demands for deep understanding in Physics, Chemistry and Mathematics
Overall, JEE Main is much more difficult exam to crack than BITSAT.

Hope this helps!!!