ECE basically involves the communication system through the electrical means like working with optical fibres, cable or maybe coax. So you learn to make the electric systems and you start working with the multiplexers, electronic switching systems, etc. Electromagnetic, optical system, digital system processing are also learned in this field. Kindly refer to the link below to know more about ECE -

https://engineering.careers360.com/articles/electronics-and-communication-engineering-0

This deals with the design and implementation of the electric circuits. It's main is to focus on the practical application of electricity, how power is generated, how it gets consumed, how can it be supplied, etc.

Refer to the link below to know more about EEE -

https://www.careers360.com/courses/electrical-and-electronics-engineering-course

Best wishes. Thank you.