Hello Tingari,

The major differences are as follows:

The Bangalore branch is newer, established in 2002, whereas the Coimbatore branch is older and was established in 1996. 

The Coimbatore branch offers Ph. D programs in core areas of CSE, whereas the Bangalore branch does not.

The research lab of Bangalore offers only Software Engineering Research opportunities, whereas the Coimbatore one offers research on more than one thrust field like Multi Dimensional Data, Cognizant Innovation, and Internet of Things (IoT).

All the best to you.