Both field has equivalent opportunity. The most important element is your interest.

Electrical engineering, one of the core courses of engineering discipline deals with the study of design, development, and maintenance of electrical systems and their components, ensuring quality, safety, reliability, and sustainability. The course focuses on the manufacturing of electrical equipment used in a number of sectors including construction and building and the production and distribution of power. Students pursuing electrical engineering study about semiconductors and microprocessors.

Mechanical engineering is a professional programme which helps students to understand the working mechanisms of heavy tools and machineries.  The branch applies principles of engineering, physics and material science for the design, analysis, manufacturing and maintenance of mechanical systems. The course covers technical areas like distribution of electricity through generators, transformers, transmission lines, lighting and wiring in buildings. A course in mechanical engineering makes a student gain knowledge and experience in the designing of electric motors, automobiles, aircrafts and other heavy vehicles.

Based on their work demands you can decide which one you are interested in.

Also to know the scope for both check the links below:

Mechanical engineering scope
Electrical engineering scope

All the best.