This type  of doubts has been spread across the internet on every time even if paper is made by Madras or paper is made by Guwahati every time there is some people who will tell you that this IIT it will make this department paper difficult.but after that one thing you should remember is that if the paper will be difficult than it will be difficult for all there for you don't need to worry because it is a competitive exam and not the absolute marking you will be judged by you are ranker not the absolute marks therefore if it is difficult then it will be difficult for all and there cannot be any certainity regarding whether it will be difficult or not if it is made by IIT Madras because if you look at the past years Trends then sometimes the paper comes difficult and sometimes easy but it will not affect you at all because if it is difficult than it is difficult for all and if it easy then it is easy for all.