Hello

I think it is better to decide the branch first and then go for college .

Both the mentioned colleges are reputed institutions

Either of the decision is good

CSE is about programming, software development etc

ECE is about digital circuits,verilog etc

By doing integrated in jntu ece you get both btech and mtech degree

If you're interested in CSE then go for sreenidhi

The Placements in sreenidhi is good .Mass recruiters  come around with package of 3.6 lakhs

Some companies like delloite ,tech Mahindra come up with package of 7 lakhs

Hope this helps you

All the best!