Dear aspirant,

As you have mentioned you want to know the difference between jee and Olympiad or which is a more tougher one between these two so let me tell you that both these examinations are hard at its own place irrespective of the questions asked in these two exams.

In Olympiad questions asked are really tough and you need a very hardcore critical thinking to crack these questions whereas in jee you also need critical thinking along with accuracy but it's a bit easier than Olympiad.