Hi, shivendra. If you're choosing the best between two colleges, you have to factors like fees, placements, infrastructure, faculty into consideration. 

First about fees

KIET fees in CSE department is 5 lakhs while RIET fees is 3.5 lakh

Placements

while KIET has a packages of up to 8 lakhs per annum while the average package is 5-7 lakhs, RIET placement packages stops at 5 lakhs that too if a person is doing well, while average is 1-2 lakhs per annum

Faculty 

KIET has better faculty than RIET, though KIET emphasises more on bookish knowledge

Infrastructure

KIET is very developed campus with all types of facilities available, RIET is alright with its development.

Over all, KIET is the best college to choose for CSE branch

Hope this helps you,

Best of luck.