If your main concern is related to fees you should go for IET College as it is government college and fee structure is less as compare to VIT. 

As per the ratings IET college has AAA+ rating which means good and VIT Vellore has AAAA+ rating which means outstanding. 

If we compare the colleges than VIT is better college as it provides excellent placements but the fee structure is high so, you can go for IET it is also good college and provides good placements.

You can also check the complete ratings and reviews of the college from the given below link

IET Ratings and Reviews

VIT Vellore, Ratings and Reviews

All the Best!!