My sister took her CSE degree from NIE Mysore. It seems to be the better between the two. Here's why:

• The placement rate is good. It was 97% this year, compared to DSCE's 75%. Sir MVIT matches the placement rate of NIE but the reputation of NIE is stronger in the industry.
• NIE has an excellent infrastructure as well. It has worked on its expansion into an ultra-modern design in the past 5 years and has incorporated excellent facilities for sports and academic development. 

The location of Mysore can be great to explore. Do not think that it's a small city, it has all the amenities and recreational and professional sites you'd need to work as an engineer. Apart from the 3 malls, you will discover plenty of places to explore during the 4 years of your academic life.