Hi Ayush,

KIET is among the best colleges of UPTU, which would anyday be better than a private university like Amity. KIET is improving year after year due to it's better faculty and placements as compared to other UPTU colleges. You can also expect lesser fees than Amity. Moreover, you must have cleared an entrance to get to KIET whereas people easily get through Amity. 

Final choice lies on you :) Amity is an average college too. 

All the best!