A few of my friends graduated from IIM Indore and having read online reviews of the alumni from other IITs here are some things I got to know.
The only benefit in IPM is that your career path would be set. However, for better placement opportunities going with IIT+IIM would be great. Also the placement team and the process are different for both the courses. Overall both IIT and IPM are best in their field. So make a wise choice and play within your strengths.