Both are the decent & private colleges in term of Faculty, Placement, Industry, Exposure etc. As per the analyzing report of Careers360 Sethu Institute of Technology, Kariapatti has AAA+ rating which means good. You can check the placement of the colleges with the given below links.

The companies visit to KLN college like TCS, Accenture,Wheels India, etc. for the campus placement and the companies like like TCS, Accenture,Wheels India, etc. visit to Sethu Placement.

You can check the genuine reviews of the colleges with the given below links.

https://engineering.careers360.com/colleges/sethu-institute-of-technology-kariapatti

https://engineering.careers360.com/colleges/kln-college-of-engineering-pottapalayam

Good Luck!