An ECE engineer designs the hardware and the CSE engineer give it the software. Your passion determines which course is better for you. Here are few point which I guess would help you determine which course is better for you.

Interest. ECE is about electronic gadgets and communication and CSE is about software development, and coding. Depending upon your interest you can decide.

Subject you are good at. CSE involves mathematics and ECE involves physics. If you are equally interested in both the subjects or you have got no such specifications, then decide the best one based upon the subject you are good at.

Placement & package. A few weeks ago I asked a class 7 kid about his aim. He said he wants to work for Google. So, if you have any such dream to work for a particular MNC, decide the better one based upon the company you want to work for. For example, if you want to work for apple/intel, go for ECE and if you want work for google/Facebook, go for CSE. And finally the package. CSE always offers you the best packages but it's now kind of saturated and there is alot of compitition for the high packages. Coming to ECE, to get a high package, you must be extremely good at applying the knowledge that you have gained in the four years.

Hope this helps you to decide which course is better for you. Make a wise decision. Good luck. :)