Hello Aspirant,

Both are excellent institutions in its own way and the decision of which is best will depend on where you want to work. IIM is best for India , Rotman is best if you want to work in Canada. Even other wise , both are good in general , they both have several global rankings and in some you may find Rotman having slightly higher ranking. However, you should decide by considering your profile and see which institute suits it the best. Other factors to consider are like fee expense,  learning expectations, like if you are keen on gaining an international exposure ,then Rotman is the best, comparison of college placements etc.You should even compare the branch in MBA  you wish to take and see which college offers best program content for that. Rotman is good for for Finance\Management Consulting & Good for Marketing\Ops Supply Chain\Technology Consulting.

The ultimate decision should be taken by , nobody knows what you need more than you. Moreover , after getting an MBA degree you will be one among the MBA crowd , so to stand with competition and get yourself a good career, you knowledge ,skills ,hard work ,dedication  and networking skills will matter more than the degree,colleges are just a lunch pad, depends on you how to use it .   I suggest you to make a good comparison between both an decide according to your requirements  .

Some helpful links:

https://www.careers360.com/university/indian-institute-of-management-bangalore/reviews

https://www.careers360.com/university/indian-institute-of-management-bangalore

https://studyabroad.careers360.com/articles/top-mba-scholarships-in-canada

https://studyabroad.careers360.com/articles/mba-in-canada-know-study-cost

All the best