Offcourse JSS noida is far better than KNIT sultanpur for Computer science department. Since JSS noida is near to delhi there you will get much better experience and exposure .

Coming to field life and campus here too jss will win as it have vast diversity and here you will get much better placement opportunity.

All the best

Hello aspirant, KNIT is lot better than JSS Noida . JSS can be better in terms of infrastructure , location but when it comes to overall development of students , KNIT is far better than JSS .KNIT placed 2nd ranked college in UPSEE . 
Hope this helps you.