Hello aspirant.,
Both the branches are good at its place and we aren't the one who should make choice for the branches you choose as it should be solely depends on your interest because you have to study the branch you choose.
Coming to the IIT's both the IIT are reputed college's and the do have good placement opportunity but apart from this IIT kharagpur has good placements with high packages ranging upto 60 lakh per annum and the average package 15lakh per annum.
You can check the link below for iit kharagpur
https://www.careers360.com/university/indian-institute-of-technology-kharagpur/placement
IIT hyderabad also have good placement with high package upto 35 lakh per annum and the average 11 lakh per annum.
You can check the link below for iit hyderabad
https://www.careers360.com/university/indian-institute-of-technology-hyderabad/placement
Hope this helps you out. Good luck
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