Hello Student,
See, Which branch to choose is entirely depends on your interest regarding that branch, your knowledge about that branch And also depends on for which branch you feel sure about...!!!
So start focusing on that first and then proceed.
Well,both colleges you have mentioned in your question are really good.
Siddaganga institute of technology,it is accredited with NAAC A grade.
Here,Faculty members are well educated and supportive.college has good record for all the departments.College has very good placement record.
Nearabout 100 reputed companies visiting the college campus every year.

NITTE Meenakshi Institute of Technology is an autonomous engineering college in Bangalore, Karnataka.
College accredited by NAAC with A+ grade and approved by AICTE.College is well known for academic excellence,quality education, and also for its successful placement drives.
Here also Nearabout 100 reputed companies visiting the college campus every year
CSE department of this college is very prestigious.Majority of the graduates from CSE department are well placed in India as well as in abroad.