I will compare SIT and KIIT on certain parameters-
The teachers in SIT are partial. The study environment is lenient and students who do not even study also end up scoring an 8 CGPA. In KIIT, however, the academic situation is even worse.
I would suggest you choose KIIT because if you work hard enough, you can end up in a company like SAP Labs with a good package. SIT offers only average placement opportunities for which the packages range from 3-4 LPA. You can choose SIT if you wish to go for higher studies.