Hey there

If you are getting both the colleges then I will advise you to go for iiit Jabalpur. IIIT Jabalpur has been ranked higher, it has lower fees than iiit city, mechanical is an evergreen branch and so you should go for iiit Jabalpur. But again I'll say that if your are interested in mechanical then only you should join Jabalpur or else go for Sri city ece.

Check JEE main cutoff

https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/articles/jee-main-cutoff/amp&ved=2ahUKEwid8_CIrZPjAhVCSX0KHednCyMQFjAAegQIAxAB&usg=AOvVaw0ay0p7xaI0Sc82xeEH0ED5&ampcf=1

Good luck