Which of the following would be better choice, an electrical at IIT Mandi, Jodhpur, Ropar, or a CSE at IIT Dharwad, Bhilai, Goa (specific interests computer science)?

You can go with the option of IIT Mandi. The recruiters from CSE offer high job packages every year to the students. IIT Mandi is the best place to change your branch to CSE, as it is one of the most competitive fields. You will be placed in a good company with high packages as a fresher in your favorite CSE field. When compared with the semi-new IITs, the best option would be Mandi. For other IITs, branch change might be a difficult task. Over the last three years, about 167 students got enrolled for placements; among them, 156 were placed. So IIT Mandi is a good choice.