There is not much difference between Computer Science Engineering and Software Engineering of DTU. Almost 95% of the course is same. Since Computer Science is a well known and sought after branch by many students, it has higher cut-offs. Otherwise both the courses are pretty much the same. 

Check out 2017 cut-offs round wise and you'll get comparison between the two branches

https://engineering.careers360.com/articles/jac-delhi-cutoff