Sudeep,
It really depends. Some people find the real PMP exam questions easier than the simulator, others feel they are harder. A lot of that comes down to your own preparation and how comfortable you are with situational questions. The simulator is intentionally designed to challenge you, but the real exam also has a certain randomness, because depending on which questions you get, your perception of difficulty may vary.
If you are consistently scoring 70% or higher in the simulator, that is a solid indicator that you are on track. The key now is to review why you got questions wrong, strengthen weaker areas, and make sure you are managing your timing and exam-day stress. Stay confident in your preparation and trust the work you have put in.