It is advised to go with ECE at IIT Guwahati. Its placements scenario is at par with DSCE or in some cases even better. Also, the institute has an extremely good campus and facilities. You will be given the tag of being an alumnus of one of the IITs of India.Except for few colleges like RVCE, IIITB, all other Colleges in Bangalore are considered to be not that good. Still, you can consider taking admission in Dayanand Sagar for Computer Science and Engineering if you have an inclination towards the metro city of Bangalore and want to stay in the urban city due to the many big firms and startups that are situated in the city, you can choose this college.

Otherwise, IIIT Guwahati should be your decision without any doubt. At last, the choice is yours that you should make only after considering all the aspects related to both the colleges.