aspirant,

Hope you are doing well,

Both the colleges are good for studying engineering but at present comparitively CSE has more scope and placement, even mechanical to has bt comparitively CSE students get job earlier.

Check below link for further more information about IIT Jammu and Kashmir,

https://www.careers360.com/university/indian-institute-of-technology-jammu

https://www.careers360.com/university/indian-institute-of-technology-jammu/reviews

Check below link for further more information about IIT BHU,

https://www.careers360.com/university/indian-institute-of-technology-banaras-hindu-university-varanasi/amp#aoh=16086169247960&referrer=https%3A%2F%2Fwww.google.com&amp_tf=From%20%251%24s

Hope this information helps,

Best of luck

Hello student, 

It totally depends upon your interest. If you are too determined that you want to persue your career in CSE, then i would suggest go for IIT jammu. However, if you are not sure about it, then i would suggest you to go for IIT BHU as its a better one. Moreover, mechanical is a really good branch. 

Cheers!