Hello
Vaishnavi Reddy , I am also a Btech 3rd year CSE student so from my experience of 3 year I knew that approx. all communication skills and HSS subjects are same for both branches and in 1st semester all subjects are same like basic programming language, mathematics, English and all.

Hope it will be helpful for you :)

Hello,

Don't worry I'll provide you link so you can easily check the syllabus of ug of CSE and ECE department.

https://www.careers360.com/courses/b-tech-computer-science-syllabus

https://www.careers360.com/courses/b-tech-ece-syllabus

I hope both links are helpful for you.

All the best.