hi aditya,
on comparing both the colleges BIT is established in 1955 and IIEST in 1856 both are well known for year of experience but on comparing both the colleges BIT has good placements and also infrastructures , academics and many more and also the average salary for BIT IS 8 lakhs for cse but in IIEST Is 6 lakhs
for more information go to below link and you can compare the colleges and gain more information
https://www.careers360.com/compare-colleges
Hope this information is helpful
ALL THE BEST
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