Hi aspirant
Both college is  best in terms of placement ,exposure and good infrastructure but you want to work indian space research organisation (isro) then without any you for iiest because you will get direct opportunity to work isro through these college
You should have atleast 1k rank in ews category
Hope it help
If you have any questions please feel free to comment below
I am more than happy to help you

Comparing IIST with IIT is quite wrong . You must know both colleges are great but every engineering college in India ranks lower as compare to IIT .But IISt is also a best college for degree. So you must know IIT is always a top institute of our college. And for knowing the information about IIST I am providing you a link that will help you to know everything. https://www.google.com/amp/s/www.careers360.com/university/indian-institute-of-information-technology-vadodara/amp

https://engineering.careers360.com/articles/iist-btech-admission/amp

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